AURORA LOAN SERVICES LLC, as Servicer LEHMAN BROTHERS HOLDINGS INC., as Seller and AURORA LOAN SERVICES LLC as Master Servicer Structured Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2006-S4 SERVICING AGREEMENT Dated as of...

AURORA LOAN SERVICES LLC,

as Servicer

XXXXXX BROTHERS HOLDINGS INC.,

as Seller

and

AURORA LOAN SERVICES LLC

as Master Servicer

_____________________________

Structured Asset Securities Corporation

Mortgage Pass-Through Certificates, Series 2006-S4

SERVICING AGREEMENT

Dated as of December 1, 2006

_____________________________

TABLE OF CONTENTS

Page


ARTICLE I. DEFINITIONS		2

ARTICLE II. SELLER’S ENGAGEMENT OF SERVICER TO PERFORM SERVICING RESPONSIBILITIES		16

Section 2.01	Contract for Servicing; Possession of Servicing Files.	16
Section 2.02	Books and Records.	17

ARTICLE III. SERVICING OF THE MORTGAGE LOANS		18

Section 3.01	Servicer to Service.	18
Section 3.02	Collection of Mortgage Loan Payments.	20
Section 3.03	Establishment of and Deposits to Custodial Account.	20
Section 3.04	Permitted Withdrawals From Custodial Account.	22
Section 3.05	Establishment of and Deposits to Escrow Account.	24
Section 3.06	Permitted Withdrawals From Escrow Account.	25
Section 3.07	Maintenance of PMI Policy and/or LPMI Policy; Claims.	25
Section 3.08	Fidelity Bond and Errors and Omissions Insurance.	27
Section 3.09	Reserved.	27
Section 3.10	Completion and Recordation of Assignments of Mortgage.	27
Section 3.11	Protection of Accounts.	27
Section 3.12	Payment of Taxes, Insurance and Other Charges.	28
Section 3.13	Maintenance of Hazard Insurance.	28
Section 3.14	Maintenance of Mortgage Impairment Insurance.	29
Section 3.15	Restoration of Mortgaged Property.	29
Section 3.16	Title, Management and Disposition of REO Property.	30
Section 3.17	Real Estate Owned Reports.	33
Section 3.18	MERS.	33
Section 3.19	Waiver of Prepayment Charges.	33
Section 3.20	Safeguarding Customer Information.	34

ARTICLE IV. PAYMENTS TO MASTER SERVICER		34

Section 4.01	Remittances.	34
Section 4.02	Statements to Master Servicer.	35
Section 4.03	Monthly Advances by Servicer.	37

ARTICLE V. GENERAL SERVICING PROCEDURES		37

Section 5.01	Servicing Compensation; Seller Remittance Amount.	37
Section 5.02	Report on Attestation of Compliance with Applicable Servicing Criteria.	38
Section 5.03	Annual Officer’s Certificate.	38
Section 5.04	Report on Assessment of Compliance with Applicable Servicing Criteria	39
Section 5.05	Transfers of Mortgaged Property.	40

ARTICLE VI. REPRESENTATIONS, WARRANTIES AND AGREEMENTS		41

Section 6.01	Representations, Warranties and Agreements of the Servicer.	41

Section 6.02	Remedies for Breach of Representations and Warranties of the Servicer.	43
Section 6.03	Additional Indemnification by the Servicer; Third Party Claims.	43
Section 6.04	Indemnification with Respect to Certain Taxes and Loss of REMIC Status.	44
Section 6.05	Reporting Requirements of the Commission and Indemnification.	45

ARTICLE VII. THE SERVICER		46

Section 7.01	Merger or Consolidation of the Servicer.	46
Section 7.02	Limitation on Liability of the Servicer and Others.	47
Section 7.03	Limitation on Resignation and Assignment by the Servicer.	47
Section 7.04	Subservicing Agreements and Successor Subservicer.	48
Section 7.05	Inspection.	49

ARTICLE VIII. TERMINATION		50

Section 8.01	Termination for Cause.	50
Section 8.02	Termination Without Cause.	52
Section 8.03	Termination for Released Mortgage Loans.	52

ARTICLE IX. MISCELLANEOUS PROVISIONS		53

Section 9.01	Successor to the Servicer.	53
Section 9.02	Costs.	55
Section 9.03	Notices.	55
Section 9.04	Severability Clause.	56
Section 9.05	No Personal Solicitation.	57
Section 9.06	Counterparts.	57
Section 9.07	Place of Delivery and Governing Law.	57
Section 9.08	Further Agreements.	58
Section 9.09	Intention of the Parties.	58
Section 9.10	Successors and Assigns; Assignment of Servicing Agreement.	58
Section 9.11	Assignment by the Seller.	58
Section 9.12	Amendment.	58
Section 9.13	Waivers.	59
Section 9.14	Exhibits.	59
Section 9.15	Intended Third Party Beneficiaries.	59
Section 9.16	General Interpretive Principles.	59
Section 9.17	Reproduction of Documents.	60
Section 9.18	Protection of Confidential Information.	60

EXHIBITS

EXHIBIT A	Mortgage Loan Schedule
EXHIBIT B	Custodial Account Certification Notice
EXHIBIT C	Escrow Account Certification Notice
EXHIBIT D-1	Form of Monthly Remittance Advice
EXHIBIT D-2	Standard Layout for Monthly Defaulted Loan Report
EXHIBIT D-3	Form of Loan Loss Report
EXHIBIT E	SASCO 2006-S4 Trust Agreement
EXHIBIT F	Form of Certification to be Provided to the Depositor, the Master Servicer and the Trustee by the Servicer
EXHIBIT G-1	[Reserved]
EXHIBIT G-2	[Reserved]
EXHIBIT H	Xxxxxx Mae Guide No. 95-19
EXHIBIT I	[Reserved]
EXHIBIT J	Servicing Criteria to be Addressed in Report on Assessment of Compliance
EXHIBIT K	Transaction Parties
EXHIBIT L	Form of Annual Officer’s Certificate

iii

SERVICING AGREEMENT

This SERVICING AGREEMENT (the “Agreement”), entered into as of the 1st day of December, 2006, by and among XXXXXX BROTHERS HOLDINGS INC., a Delaware corporation (“LBH” or the “Seller”), AURORA LOAN SERVICES LLC, a Delaware limited liability company in its capacity as a primary servicer (the “Servicer”) and AURORA LOAN SERVICES LLC in its capacity as master servicer (the “Master Servicer”), and acknowledged by CITIBANK, N.A., as Trustee (the “Trustee”) under the Trust Agreement (as defined herein) recites and provides as follows:

RECITALS

WHEREAS, the Servicer and Xxxxxx Brothers Bank, FSB, a federal savings bank (the “Bank”) are parties to a Flow Servicing Agreement dated as of August 31, 1999 (the “Flow Servicing Agreement”), pursuant to which the Servicer services certain residential, fixed rate mortgage loans identified on Exhibit A hereto (the “Mortgage Loans”);

WHEREAS, the Mortgage Loans are all second lien mortgage loans and the Seller is not the holder of any Superior Lien (as defined herein) on the related Mortgaged Property;

WHEREAS, at or prior to the Closing Date (as defined herein) the Bank and LBH shall enter into an Assignment and Assumption Agreement dated as of December 1, 2006 (the “Assignment and Assumption Agreement”), pursuant to which the Bank shall assign all of its rights, title and interest in and to the Mortgage Loans to LBH and LBH shall assume all of the rights and obligations of the Bank with respect to the Mortgage Loans under the Flow Servicing Agreement;

WHEREAS, the Seller has conveyed the Mortgage Loans on a servicing-retained basis to Structured Asset Securities Corporation (the “Depositor”), which in turn has conveyed the Mortgage Loans to the Trustee under a trust agreement dated as of December 1, 2006 (the “Trust Agreement”), among the Trustee, the Depositor, the Master Servicer and Xxxxxxx Fixed Income Services Inc., as credit risk manager (the “Credit Risk Manager”);

WHEREAS, the Seller desires that the Servicer service the Mortgage Loans pursuant to this Agreement, and the Servicer has agreed to do so, subject to the right of the Seller with respect to the Mortgage Loans to terminate the rights and obligations of the Servicer hereunder at any time as provided herein;

WHEREAS, the Master Servicer shall be obligated under the Trust Agreement, among other things, to supervise the servicing of the Mortgage Loans on behalf of the Trustee, and shall have the right, under certain circumstances, to terminate the rights and obligations of the Servicer under this Agreement upon the occurrence and continuance of an Event of Default as provided herein;

WHEREAS, the Seller and the Servicer agree that the provisions of the Flow Servicing Agreement shall not apply to the related Mortgage Loans for so long as such Mortgage Loans remain subject to the provisions of the Trust Agreement;

WHEREAS, multiple classes of certificates (the “Certificates”), including the Class P and the Class X Certificates, will be issued on the Closing Date pursuant to the Trust Agreement and Xxxxxx Brothers Inc. or a nominee thereof is expected to be the initial registered holder of the Class P and Class X Certificates;

WHEREAS, the Seller and the Servicer acknowledge and agree that the Seller will assign certain of its rights and obligations (excluding such Seller’s rights and obligations as owner of the servicing rights relating to the Mortgage Loans and the Seller’s obligations pursuant to Section 9.01, all of which rights and obligations will remain with the Seller or be delegated to or assumed by the Master Servicer) to the Depositor and the Depositor will assign all of its rights (but not the obligations, except as provided in the Trust Agreement) hereunder to the Trustee pursuant to the Trust Agreement, and that each reference herein (other than with respect to the Seller’s ownership of servicing rights) to the Seller is intended, unless otherwise specified, to mean the Seller or the Trustee as assignee, whichever is the owner of the Mortgage Loans from time to time;

NOW, THEREFORE, in consideration of the mutual agreements hereinafter set forth and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the Seller, the Master Servicer and the Servicer hereby agree as follows:

ARTICLE I.

DEFINITIONS

The following terms are defined as follows (except as otherwise agreed in writing by the parties):

Accepted Servicing Practices: With respect to any Mortgage Loan, those mortgage servicing practices (i) of prudent mortgage lending institutions that service mortgage loans of the same type as such Mortgage Loans in the jurisdiction where the related Mortgaged Property is located and (ii) in accordance with applicable state, local and federal laws, rules and regulations provided, further, that, unless otherwise specified in this Agreement, such mortgage servicing practices shall be undertaken in accordance with the provisions of the Xxxxxx Xxx Guides.

Aggregate Loan Balance: At any date of determination, the outstanding principal balance of the Mortgage Loans serviced hereunder.

Agreement: This Servicing Agreement and all amendments hereof and supplements hereto.

Ancillary Income: All income derived from the Mortgage Loans, excluding the Aurora Servicing Fees and Prepayment Charges attributable to the Mortgage Loans, including but not limited to interest received on funds deposited in the Custodial Account or any Escrow Account, late charges, fees received with respect to checks or bank drafts returned by the related bank for non-sufficient funds, assumption fees, optional insurance administrative fees and all other incidental fees and charges.

Assignment of Mortgage: An assignment of the Mortgage, notice of transfer or equivalent instrument in recordable form, sufficient under the laws of the jurisdiction wherein the related Mortgaged Property is located to reflect the transfer of the Mortgage to the party indicated therein, which assignment, notice of transfer or equivalent instrument may be in the form of one or more blanket assignments covering the Mortgage Loans secured by Mortgaged Properties located in the same jurisdiction, if permitted by law.

Aurora Servicing Fee: With respect to each Due Period and any Mortgage Loan, an amount equal to the sum of (a) one-twelfth the product of (i) the Aurora Servicing Fee Rate and (ii) the outstanding principal balance of such Mortgage Loan as of the related Determination Date and (b) any Prepayment Interest Excess Amount. The Aurora Servicing Fee is limited to, and the Aurora Servicing Fee is payable solely from, the interest portion (including recoveries with respect to interest from Liquidation Proceeds) of such Monthly Payments collected by the Servicer, or as otherwise provided under this Agreement. No Aurora Servicing Fee will accrue with respect to any Charged-off Loan or Released Mortgage Loan.

Aurora Servicing Fee Rate: As provided in the Mortgage Loan Schedule.

Bank: Xxxxxx Brothers Bank, FSB or any successor thereto.

Best Efforts: Efforts determined to be reasonably diligent by the Seller or the Servicer, as the case may be, taking into account Accepted Servicing Practices. Such efforts do not require the Seller or Servicer, as the case may be, to enter into any litigation, arbitration or other legal or quasi-legal proceeding, nor do they require the Seller or Servicer, as the case may be, to advance or expend fees or sums of money in addition to those specifically set forth in this Agreement.

Business Day: Any day other than (i) a Saturday or Sunday, or (ii) a day on which banking or savings and loan institutions in the States of New York, Nebraska, Colorado and Illinois are authorized or obligated by law or executive order to be closed.

Certificates: Any or all of the Certificates issued pursuant to the Trust Agreement.

Charged-off Loan: As of any date of determination, any Mortgage Loan other than a Covered Mortgage Loan that was Delinquent in payment for a period of 180 days or more as of the last calendar day of the month immediately preceding the month in which such date of determination occurs, without giving effect to any grace period permitted by the related Mortgage Note; provided, however, that with respect to any such Mortgage Loan, (i) an equity analysis performed by the Servicer supports charge-off over foreclosure, (ii) the related Mortgaged Property has not become REO Property, (iii) there are no active foreclosure or other loss mitigation activities and (iv) nothing has come to the attention of the Servicer indicating that any such Mortgage Loan, at the time of its origination, violated any applicable federal, state or local law or regulation, including, without limitation, usury, truth-in-lending, consumer credit protection and privacy, equal credit opportunity, disclosure or predatory and abusive lending laws, applicable to the origination and servicing of such Mortgage Loan.

Closing Date: December 28, 2006.

Code: The Internal Revenue Code of 1986, as it may be amended from time to time or any successor statute thereto, and applicable U.S. Department of the Treasury regulations issued pursuant thereto.

Combined Loan-to-Value Ratio: As to any Mortgage Loan at any date of determination, the ratio (expressed as a percentage) of the principal balance of such Mortgage Loan at the date of determination, plus the principal balance of any Superior Lien based upon the most recent information available to the Servicer, to (a) in the case of a purchase, the lesser of the sales price of the Mortgaged Property and its appraised value at the time of sale, or (b) in the case of a refinancing or modification, the appraised value of the Mortgaged Property at the time of such refinancing or modification.

Commission: The United States Securities and Exchange Commission.

Condemnation Proceeds: All awards or settlements in respect of a Mortgaged Property, whether permanent or temporary, partial or entire, by exercise of the power of eminent domain or condemnation, to the extent not required to be released to a Mortgagor in accordance with the terms of the related Mortgage Loan documents.

Costs: For any Person, any claims, losses, damages, penalties, fines, forfeitures, reasonable and necessary legal fees and related costs, judgments, and other costs and expenses of such Person.

Covered Mortgage Loan: Any Mortgage Loan that is covered by a PMI Policy.

Custodial Account: Each separate account or accounts created and maintained pursuant to Section 3.03.

Custodial Agreement: Each custodial agreement relating to custody of certain of the Mortgage Loans, between the applicable Custodian and the Trustee, as acknowledged by the Depositor, the Seller, the Master Servicer and the Servicer, dated as of December 1, 2006.

Custodian: Each of LaSalle Bank National Association and U.S. Bank National Association, and their respective successors and assigns.

Cut-off Date: December 1, 2006.

Delinquent: For reporting purposes, a Mortgage Loan is “Delinquent” when any payment contractually due thereon has not been made by the close of business on the Due Date therefor. Such Mortgage Loan is “30 days Delinquent” if such payment has not been received by the close of business on the corresponding day of the month immediately succeeding the month in which such payment was first due, or, if there is not such corresponding day (e.g., as when a 30-day month follows a 31-day month in which a payment was due on the 31^st day of such month), then on the last day of such immediately succeeding month. Similarly for “60 days Delinquent” and the second immediately succeeding month and “90 days Delinquent” and the third immediately succeeding month.

Depositor: Structured Asset Securities Corporation, a Delaware corporation, or any successor in interest.

Determination Date: With respect to each Remittance Date, the 15th day of the month in which such Remittance Date occurs, or, if such 15th day is not a Business Day, the next succeeding Business Day.

Distribution Date: Commencing in January 2007, the 25th day of each month (or if such day is not a Business Day, the next succeeding Business Day).

Due Date: The day of the month on which the Monthly Payment is due on a Mortgage Loan, exclusive of any days of grace. With respect to the Mortgage Loans for which payment from the Mortgagor is due on a day other than the first day of the month, such Mortgage Loans will be treated as if the Monthly Payment is due on the first day of the immediately succeeding month.

Due Period: With respect to each Remittance Date, the period commencing on the second day of the month immediately preceding the month of the Remittance Date and ending on the first day of the month of the Remittance Date.

Eligible Deposit Account: An account that is maintained with a federal or state-chartered depository institution or trust company that complies with the definition of Eligible Institution.

Eligible Institution: Any of the following:

(i)

an institution whose:

(A) commercial paper, short-term debt obligations, or other short-term deposits are rated at least “A-1+” or long-term unsecured debt obligations are rated at least “AA-” by S&P, if the amounts on deposit are to be held in the account for no more than 365 days; or

(B) commercial paper, short-term debt obligations, demand deposits, or other short-term deposits are rated at least “A-2” by S&P, if the amounts on deposit are to be held in the account for no more than 30 days and are not intended to be used as credit enhancement. Upon the loss of the required rating set forth in clause (i)(A) above or this clause (i)(B), the accounts shall be transferred immediately to accounts which have the required rating. Furthermore, commingling by the Servicer is acceptable at the A-2 rating level if the Servicer is a bank, thrift or depository and provided the Servicer has the capability to immediately segregate funds and commence remittance to an Eligible Deposit Account upon a downgrade;

(ii) the corporate trust department of a federal depository institution or state-chartered depository institution subject to regulations regarding fiduciary funds on deposit similar to Title 12 of the U.S. Code of Federal Regulation Section 9.10(b), which, in either case, has corporate trust powers and is acting in its fiduciary capacity; or

(iii) the Bank.

Eligible Investments: Any one or more of the obligations and securities listed below which investment provides for a date of maturity not later than the Determination Date in each month:

(i) direct obligations of, and obligations fully guaranteed as to timely payment of principal and interest by, the United States of America or any agency or instrumentality of the United States of America the obligations of which are backed by the full faith and credit of the United States of America (“Direct Obligations”);

(ii) federal funds, demand and time deposits in, certificates of deposits of, or bankers’ acceptances issued by, any depository institution or trust company (including U.S. subsidiaries of foreign depositories, the Trustee, the Master Servicer or any agent of the Trustee or the Master Servicer, acting in its respective commercial capacity) incorporated or organized under the laws of the United States of America or any state thereof and subject to supervision and examination by federal or state banking authorities, so long as at the time of investment or the contractual commitment providing for such investment the commercial paper or other short-term debt obligations of such depository institution or trust company (or, in the case of a depository institution or trust company which is the principal subsidiary of a holding company, the commercial paper or other short-term debt or deposit obligations of such holding company or deposit institution, as the case may be) have been rated by each Rating Agency in its highest short-term rating category or one of its two highest long-term rating categories;

(iii) repurchase agreements collateralized by Direct Obligations or securities guaranteed by Xxxxxx Xxx or Xxxxxxx Mac with any registered broker/dealer subject to Securities Investors’ Protection Corporation jurisdiction or any commercial bank insured by the FDIC, if such broker/dealer or bank has an uninsured, unsecured and unguaranteed obligation rated by each Rating Agency in its highest short-term rating category;

(iv) securities bearing interest or sold at a discount issued by any corporation incorporated under the laws of the United States of America or any state thereof which have a credit rating from each Rating Agency, at the time of investment or the contractual commitment providing for such investment, at least equal to one of the two highest long-term credit rating categories of each Rating Agency; provided, however, that securities issued by any particular corporation will not be Eligible Investments to the extent that investment therein will cause the then outstanding principal amount of securities issued by such corporation and held as part of the Trust Fund to exceed 20% of the sum of the Aggregate Loan Balance and the aggregate principal amount of all Eligible Investments in the Certificate Account; provided, further, that such securities will not be Eligible Investments if they are published as being under review with negative implications from any Rating Agency;

(v) commercial paper (including both non-interest-bearing discount obligations and interest-bearing obligations payable on demand or on a specified date not more than 180 days after the date of issuance thereof) rated by each Rating Agency in its highest short-term rating category;

(vi) a Qualified GIC;

(vii) certificates or receipts representing direct ownership interests in future interest or principal payments on obligations of the United States of America or its agencies or instrumentalities (which obligations are backed by the full faith and credit of the United States of America) held by a custodian in safekeeping on behalf of the holders of such receipts; and

(viii) any other demand, money market, common trust fund or time deposit or obligation, or interest-bearing or other security or investment, (A) rated in the highest rating category by each Rating Agency or (B) that would not adversely affect the then current rating by any Rating Agency then rating the Certificates and has a short term rating of at least “A-1” or its equivalent by each Rating Agency. Such investments in this subsection (viii) may include money market mutual funds or common trust funds, including any fund for which the Trustee, the Master Servicer or an affiliate of any such entity serves as an investment advisor, administrator, shareholder servicing agent, and/or custodian or subcustodian, notwithstanding that (x) the Trustee, the Master Servicer or an affiliate of any such entity charges and collects fees and expenses from such funds for services rendered, (y) the Trustee, the Master Servicer or an affiliate of any such entity charges and collects fees and expenses for services rendered pursuant to this Agreement, and (z) services performed for such funds and pursuant to this Agreement may converge at any time; provided, however, that no such instrument shall be an Eligible Investment if such instrument evidences either (i) a right to receive only interest payments with respect to the obligations underlying such instrument, or (ii) both principal and interest payments derived from obligations underlying such instrument and the principal and interest payments with respect to such instrument provide a yield to maturity of greater than 120% of the yield to maturity at par of such underlying obligations.

Errors and Omissions Insurance: Errors and Omissions Insurance to be maintained by the Servicer in accordance with the Xxxxxx Mae Guides.

Escrow Account: The separate account or accounts created and maintained pursuant to Section 3.05.

Escrow Payments: With respect to any Mortgage Loan, the amounts constituting ground rents, taxes, assessments, water rates, sewer rents, municipal charges, mortgage insurance premiums, fire and hazard insurance premiums, condominium charges, and any other payments required to be escrowed by the Mortgagor with the mortgagee pursuant to the Mortgage or any other document.

Event of Default: Any event set forth in Section 8.01.

Xxxxxx Xxx: The Federal National Mortgage Association or any successor thereto.

Xxxxxx Mae Guides: The Xxxxxx Xxx Xxxxxxx’ Guide and the Xxxxxx Mae Servicers’ Guide.

FDIC: The Federal Deposit Insurance Corporation, or any successor thereto.

Fidelity Bond: A fidelity bond to be maintained by the Servicer in accordance with the Xxxxxx Xxx Guides.

Fitch: Fitch Ratings, Inc., or any successor in interest.

Xxxxxxx Mac: The Federal Home Loan Mortgage Corporation or any successor thereto.

General Servicing Fee: With respect to each Due Period and any Mortgage Loan, an amount equal to one-twelfth the product of (i) the General Servicing Fee Rate and (ii) the outstanding principal balance of such Mortgage Loan as of the related Determination Date. The General Servicing Fee is payable solely from, the interest portion (including recoveries with respect to interest from Liquidation Proceeds) of such Monthly Payments collected by the Servicer, or as otherwise provided under this Agreement. No General Servicing Fee will accrue with respect to any Charged-off Loan or Released Mortgage Loan.

General Servicing Fee Rate: 0.50% per annum.

Xxxxxx Mae: The Government National Mortgage Association or any successor thereto.

Insurance Proceeds: With respect to each Mortgage Loan, proceeds of insurance policies insuring the Mortgage Loan or the related Mortgaged Property including proceeds of any hazard or flood insurance policy, PMI Policy or LPMI Policy.

LBH: Xxxxxx Brothers Holdings Inc. or any successor in interest.

Liquidation Proceeds: Cash received in connection with the liquidation of a defaulted Mortgage Loan, whether through the sale or assignment of such Mortgage Loan, discounted payoff, trustee’s sale, foreclosure sale or otherwise, or the sale of the related REO Property, if the Mortgaged Property is acquired in satisfaction of the Mortgage Loan.

LPMI Fee: With respect to each LPMI Loan, the portion of the Mortgage Interest Rate as set forth on the related Mortgage Loan Schedule (which shall be payable solely from the interest portion of Monthly Payments, Insurance Proceeds, Condemnation Proceeds or Liquidation Proceeds), which, during such period prior to the required cancellation of the LPMI Policy, shall be used to pay the premium due on the related LPMI Policy.

LPMI Loan: A Mortgage Loan covered by a LPMI Policy as set forth in the Mortgage Loan Schedule or otherwise identified to the Servicer in writing.

LPMI Policy: A policy of primary mortgage guaranty insurance issued by a Qualified Insurer pursuant to which the related premium is to be paid from payments of interest made by the Mortgagor.

Master Servicer: Aurora Loan Services LLC, or any successor in interest, or if any successor master servicer shall be appointed as provided in the Trust Agreement, then such successor master servicer.

MERS: Mortgage Electronic Registration Systems, Inc., a Delaware corporation, or any successor in interest thereto.

MERS Eligible Mortgage Loan: Any Mortgage Loan that has been designated by the Servicer as recordable in the name of MERS.

MERS Mortgage Loan: Any Mortgage Loan as to which the related Mortgage, or an Assignment of Mortgage, has been or will be recorded in the name of MERS, as agent for the holder from time to time of the Mortgage Note.

Monthly Advance: With respect to each Remittance Date and each Mortgage Loan (other than a Simple Interest Mortgage Loan or a Charged-off Loan), an amount equal to the Monthly Payment (with the interest portion of such Monthly Payment adjusted to the Mortgage Loan Remittance Rate or, at the Servicer’s option, at a rate equal to the related Mortgage Interest Rate minus the Aurora Servicing Fee Rate) that was due on the Mortgage Loan on the Due Date in the related Due Period, and that (i) was Delinquent (or deferred pursuant to Section 3.01) at the close of business on the related Determination Date and (ii) was not the subject of a previous Monthly Advance, but only to the extent that such amount is expected, in the reasonable judgment of the Servicer, to be recoverable from collections or other recoveries in respect of such Mortgage Loan; provided, for the purpose of clarification, that the Servicer shall not be required to make a Monthly Advance for any payments of principal or interest with respect to a reduction in the value of a Mortgage Note upon the order of a bankruptcy court of competent jurisdiction. With respect to each Remittance Date and each Simple Interest Mortgage Loan, an amount equal to the interest accrued on such Mortgage Loan through the related Due Date, but not received as of the close of business on the last day of the related Due Period (net of the General Servicing Fee), but only to the extent that such amount is expected, in the reasonable judgment of the Servicer, to be recoverable from collections or other recoveries in respect of such Simple Interest Mortgage Loan. To the extent that the Servicer determines that any such amount is not recoverable from collections or other recoveries in respect of such Mortgage Loan, such determination shall be evidenced by a certificate of a Servicing Officer delivered to the Master Servicer setting forth such determination and the procedures and considerations of the Servicer forming the basis of such determination.

Monthly Payment: The scheduled monthly payment of principal and interest on a Mortgage Loan.

Moody’s: Xxxxx’x Investors Service, Inc. or any successor in interest.

Mortgage: The mortgage, deed of trust or other instrument securing a Mortgage Note, which creates a second lien on an unsubordinated estate in fee simple in real property securing the Mortgage Note.

Mortgage Impairment Insurance Policy: A mortgage impairment or blanket hazard insurance policy as described in Section 3.14 hereof.

Mortgage Interest Rate: The annual rate of interest borne on a Mortgage Note after giving effect to any Relief Act Reduction.

Mortgage Loan: An individual Mortgage Loan that is the subject of this Agreement, each Mortgage Loan subject to this Agreement being identified on the Mortgage Loan Schedule, which Mortgage Loan includes without limitation the Mortgage Loan documents, the Monthly Payments, Principal Prepayments, Liquidation Proceeds, Condemnation Proceeds, Insurance Proceeds, REO Disposition Proceeds, and all other rights, benefits, proceeds and obligations arising from or in connection with such Mortgage Loan. All of the Mortgage Loans create a junior priority lien on the related Mortgaged Property, subject to the related Superior Lien on the Mortgaged Property. Any Released Mortgage Loan will not be considered a Mortgage Loan subject to this Agreement.

Mortgage Loan Remittance Rate: With respect to each Mortgage Loan, the annual rate of interest remitted to the Master Servicer, which shall be equal to the Mortgage Interest Rate minus the General Servicing Fee.

Mortgage Loan Schedule: A schedule of the Mortgage Loans attached hereto as Exhibit A setting forth information with respect to such Mortgage Loans as agreed to by the Seller, the Servicer and the Master Servicer, including but not limited to (i) any MERS identification number (if available) with respect to each MERS Mortgage Loan or MERS Eligible Mortgage Loan, (ii) a data field indicating whether such Mortgage Loan is insured under a PMI or LPMI Policy and identifying the related Qualified Insurer, (iii) a data field indicating the applicable Custodian of the related Mortgage File, (iv) a Prepayment Charge Schedule, (v) a data field indicating whether the Mortgage Loan is subject to an early payment default repurchase obligation, (vi) a data field designated “DSI” indicating whether such Mortgage Loan is a Simple Interest Mortgage Loan and (vii) a data field indicating the Aurora Servicing Fee Rate. The Mortgage Loan Schedule may be amended from time to time to include additional mortgage loans which are transferred to the Servicer by a Prior Servicer in a Servicing Transfer or, based on notice received from the Seller, the substitution of a Qualifying Substitute Mortgage Loan for a defective Mortgage Loan for a defective loan pursuant to Section 2.05 of the Trust Agreement, or to exclude Mortgage Loans transferred to be serviced by another servicer.

Mortgage Note: The note or other evidence of the indebtedness of a Mortgagor secured by a Mortgage.

Mortgaged Property: The real property securing repayment of the debt evidenced by a Mortgage Note.

Mortgagor: The obligor on a Mortgage Note.

Net Mortgage Rate: With respect to any Mortgage Loan, the related Mortgage Interest Rate with respect to such Mortgage Loan, less the Aurora Servicing Fee Rate.

Net Simple Interest Excess: With respect to any Distribution Date, the excess, if any, of (a) the amount of the payments received by the Servicer in the related Due Period allocable to interest in respect of Simple Interest Mortgage Loans, calculated in accordance with the Simple Interest Method, net of the related Servicing Fees, over (b) 30 days’ interest at the weighted average (by principal balance) of the Net Mortgage Rates of the Simple Interest Mortgage Loans as of the first day of the related Due Period, as determined by the Servicer, on the aggregate principal balance of such Simple Interest Mortgage Loans for such Distribution Date, carried to six decimal places, rounded down, and calculated on the basis of a 360-day year consisting of twelve 30-day months. For this purpose, the amount of interest received in respect of the Simple Interest Mortgage Loans in any month shall be deemed (a) to include any Monthly Advances of interest made by the Servicer in such month in respect of such Simple Interest Mortgage Loans and (b) to be reduced by any amounts paid to the Servicer in such month in reimbursement of Monthly Advances previously made by the Servicer in respect of such Simple Interest Mortgage Loans.

Net Simple Interest Shortfall: With respect to any Distribution Date, the excess, if any, of (a) 30 days’ interest at the weighted average (by principal balance) of the Net Mortgage Rates of the Simple Interest Mortgage Loans as of the first day of the related Due Period, as determined by the Servicer, on the aggregate principal balance of such Simple Interest Mortgage Loans for such Remittance Date, carried to six decimal places, rounded down, and calculated on the basis of a 360-day year consisting of twelve 30-day months, over (b) the amount of the payments received by the Servicer in the related Due Period allocable to interest in respect of such Simple Interest Mortgage Loans, calculated in accordance with the Simple Interest Method, net of the related Servicing Fees.

Non-MERS Eligible Mortgage Loan: Any Mortgage Loan other than a MERS Eligible Mortgage Loan.

Non-MERS Mortgage Loan: Any Mortgage Loan other than a MERS Mortgage Loan.

Opinion of Counsel: A written opinion of counsel, who may be an employee of the Servicer, reasonably acceptable to the Seller, the Trustee and the Master Servicer, but which must be independent outside counsel with respect to any such opinion of counsel concerning (i) the non-recordation of Mortgage Loans pursuant to Section 2.02 hereof and (ii) all federal income tax matters.

Participating Entity: Any Subcontractor or Subservicer that is “participating in the servicing function” within the meaning of Item 1122 of Regulation AB; provided that for the purposes of the third paragraph of Section 7.04(c), a “Participating Entity” shall be determined without respect to any threshold limitations in Instruction 2. to Item 1122 of Regulation AB.

Person: Any individual, corporation, partnership, limited liability company, joint venture, association, joint-stock company, trust, unincorporated organization, government or any agency or political subdivision thereof.

PMI Policy: A policy of primary mortgage guaranty insurance issued by a Qualified Insurer, including any bulk policy or other primary mortgage insurance policy acquired in respect of all or certain of the Mortgage Loans, as required by this Agreement or the Trust Agreement.

Prepayment Charge: With respect to any Mortgage Loan and Remittance Date, the charges or premiums, if any, due in connection with a full or partial prepayment of such Mortgage Loan during the immediately preceding Prepayment Period in accordance with the terms thereof (but excluding any Servicer Prepayment Charge Payment Amount).

Prepayment Charge Schedule: A data field in the Mortgage Loan Schedule which indicates the amount or method of calculation of the Prepayment Charge and the term during which it is imposed with respect to a Mortgage Loan.

Prepayment Interest Excess Amount: With respect to any Remittance Date and any Principal Prepayment in full which is applied to the related Mortgage Loan from the first day of the month of such Remittance Date through the fifteenth day of the month of such Remittance Date, all amounts paid in respect of interest on such Principal Prepayment in full. A Prepayment Interest Excess Amount cannot result from a Principal Prepayment in part, but only from a Principal Prepayment in full.

Prepayment Interest Shortfall Amount: With respect to any Remittance Date and any Principal Prepayment in full which is applied to the related Mortgage Loan from the sixteenth day of the month immediately preceding the month of such Remittance Date through the last day of the month immediately preceding the month of such Remittance Date, the amount of interest (net of the General Servicing Fee) that would have accrued on the amount of such Principal Prepayment in full from the date on which such Principal Prepayment was applied to such Mortgage Loan until the last day of the month immediately preceding the month of such Remittance Date, inclusive. With respect to any Remittance Date and any Principal Prepayment in part which is applied to the related Mortgage Loan during the related Prepayment Period, the amount of interest that would have accrued on the amount of such Principal Prepayment in part from the date on which such Principal Prepayment in part was applied to such Mortgage Loan until the end of the Prepayment Period, inclusive.

Prepayment Period: With respect to any Remittance Date and a Principal Prepayment in full, the period from the sixteenth day of the month immediately preceding the month of such Remittance Date to the fifteenth day of the month of such Remittance Date. With respect to any Remittance Date and any Principal Prepayment in part, the calendar month immediately preceding the month of such Remittance Date.

Prime Rate: The prime rate published from time to time, as published as the average rate in The Wall Street Journal.

Principal Prepayment: Any payment or other recovery of principal on a Mortgage Loan, which is received in advance of its scheduled Due Date.

Prior Servicer: Any prior servicer (other than the Servicer) of any of the Mortgage Loans.

Qualified GIC: A guaranteed investment contract or surety bond providing for the investment of funds in the Custodial Account and insuring a minimum, fixed or floating rate of return on investments of such funds, which contract or surety bond shall:

(i) be an obligation of an insurance company or other corporation whose long-term debt is rated by each Rating Agency in one of its two highest rating categories or, if such insurance company has no long-term debt, whose claims paying ability is rated by each Rating Agency in one of its two highest rating categories, and whose short-term debt is rated by each Rating Agency in its highest rating category;

(ii) provide that the Servicer may exercise all of the rights under such contract or surety bond without the necessity of taking any action by any other Person;

(iii) provide that the Trustee’s interest therein shall be transferable to any successor trustee hereunder; and

(iv) provide that the funds reinvested thereunder and accrued interest thereon be returnable to the Custodial Account not later than the Business Day prior to any Remittance Date.

Qualified Insurer: A mortgage guaranty insurance company duly authorized and licensed where required by law to transact mortgage guaranty insurance business and approved as an insurer by Xxxxxx Xxx or Xxxxxxx Mac.

Rating Agency: Each of Xxxxx’x and S&P and any successors. If such agencies or their successors are no longer in existence, “Rating Agencies” shall be such nationally recognized statistical rating agencies, or other comparable person, designated by the Seller, notice of which designation shall be given to the Trustee, the Master Servicer and the Servicer.

Regulation AB: Subpart 229.1100 - Asset Backed Securities (Regulation AB), 17 C.F.R. §§229.1100-229.1123, as such may be amended from time to time, and subject to such clarification and interpretation as have been provided by the Commission in the adopting release (Asset-Backed Securities, Securities Act Release No. 33-8518, 70 Fed. Reg. 1,506, 1,531 (Jan. 7, 2005)) or by the staff of the Commission, or as may be provided by the Commission or its staff from time to time.

Released Mortgage Loan: As of any Transfer Date, any Mortgage Loan other than a Covered Mortgage Loan that was Delinquent in payment for a period of time equal to the later to occur of (i) 210 days or more or (ii) 30 days or more after such Mortgage Loan became a Charged-off Loan, in each case as of the last calendar day of the month immediately preceding the month in which such Transfer Date occurs, without giving effect to any grace period permitted by the related Mortgage Note, and for which foreclosure proceedings have not been initiated.

Released Mortgage Transferee: The Master Servicer.

Relief Act Reduction: With respect to any Mortgage Loan as to which there has been a reduction in the amount of the interest collectible thereon as a result of the application of the Servicemembers Civil Relief Act, as amended, or similar state or local law, any amount by which interest collectible on such Mortgage Loan for the Due Date in the related Due Period is less than the interest accrued thereon for the applicable one-month period at the Mortgage Interest Rate without giving effect to such reduction.

REMIC: A “real estate mortgage investment conduit” within the meaning of Section 860D of the Code.

REMIC Provisions: The provisions of the federal income tax law relating to real estate mortgage investment conduits which appear at sections 860A through 860G of Subchapter M of Chapter 1 of the Code, and related provisions, and regulations, including proposed regulations and rulings, and administrative pronouncements promulgated thereunder, as the foregoing may be in effect from time to time.

Remittance Date: The 18th day (or if such 18th day is not a Business Day, the first Business Day immediately following) of any month.

REO Disposition: The final sale or other disposition by the Servicer of any REO Property.

REO Disposition Proceeds: All amounts received with respect to an REO Disposition pursuant to Section 3.16 hereof.

REO Property: A Mortgaged Property acquired by the Servicer on behalf of the Trustee through foreclosure or by deed in lieu of foreclosure pursuant to Section 3.16 hereof.

Residual Certificate: Any Class LT-R or Class R Certificate.

Retained Interest: Not applicable.

Retained Interest Holder: Not applicable.

Retained Interest Rate: Not applicable.

S&P: Standard and Poor’s Ratings Services, a division of The XxXxxx-Xxxx Companies, Inc. or any successor in interest.

Seller: LBH.

Seller Remittance Amount: With respect to each Due Period and any Mortgage Loan, an amount equal to one-twelfth the product of (a) the Seller Remittance Rate and (b) the outstanding principal balance of the Mortgage Loan as of the related Determination Date. The obligation of the Servicer to pay the Seller Remittance Amount with respect to a Mortgage Loan is limited to, and the Seller Remittance Amount is payable solely from, the interest portion (including recoveries with respect to interest from Liquidation Proceeds to the extent permitted by Section 3.04 of this Agreement) of the Monthly Payments collected by the Servicer with respect to such Mortgage Loan, or as otherwise provided under this Agreement.

Seller Remittance Rate: With respect to each Mortgage Loan, the difference between the General Servicing Fee Rate and the Aurora Servicing Fee Rate.

Servicer: Aurora Loan Services LLC or its successor in interest or assigns or any successor to the Servicer under this Agreement as herein provided.

Servicer Prepayment Charge Payment Amount: The amount payable by the Servicer in respect of any impermissibly waived Prepayment Charges pursuant to Section 3.19 hereof.

Servicing Advances: With respect to each Mortgage Loan other than a Charged-off Loan, all customary, reasonable and necessary “out of pocket” costs and expenses other than Monthly Advances (including reasonable attorneys’ fees and disbursements) incurred in the performance by the Servicer of its servicing obligations, including, but not limited to, the cost of (a) the preservation, inspection, restoration and protection of the Mortgaged Property, (b) any enforcement or administrative or judicial proceedings, including foreclosures and bankruptcies, (c) the management and liquidation of the Mortgaged Property if the Mortgaged Property is acquired in satisfaction of the Mortgage, (d) taxes, assessments, water rates, sewer rents and other charges which are or may become a lien upon the Mortgaged Property, (e) PMI Policy premiums and fire and hazard insurance coverage, (f) any losses sustained by the Servicer with respect to the liquidation of the Mortgaged Property and (g) compliance with the obligations pursuant to the provisions of the Xxxxxx Mae Guides.

Servicing File: The items pertaining to a particular Mortgage Loan including, but not limited to, the computer files, data disks, books, records, data tapes, notes, and all additional documents generated as a result of or utilized in originating and/or servicing each Mortgage Loan, which are held in trust for the Trustee by the Servicer.

Servicing Officer: Any officer of the Servicer involved in or responsible for, the administration and servicing of the Mortgage Loans whose name appears on a list of servicing officers furnished by the Servicer to the Master Servicer or Seller upon request, as such list may from time to time be amended.

Servicing Transfer: Any transfer of the servicing by a Prior Servicer of Mortgage Loans to the Servicer under this Agreement.

Servicing Transfer Date: The date on which a Servicing Transfer occurs.

Simple Interest Method: The method of allocating a payment to principal and interest, pursuant to which the portion of such payment that is allocated to interest is equal to the product of the applicable rate of interest multiplied by the unpaid principal balance multiplied by the period of time elapsed since the preceding payment of interest was made and divided by either 360 or 365, as specified in the related Mortgage Note and the remainder of such payment is allocated to principal.

Simple Interest Mortgage Loan: Those simple interest loans as noted on the Mortgage Loan Schedule under the data field designated “DSI.”

Subcontractor: Any vendor, subcontractor or other Person (determined solely by the Servicer) that is not responsible for the overall servicing (as “servicing” is commonly understood by participants in the mortgage-backed securities market) of the Mortgage Loans but performs one or more discrete functions identified in Item 1122(d) of Regulation AB with respect to the Mortgage Loans under the direction or authority of the Servicer or a related Subservicer.

Subservicer: Any Person (determined solely by the Servicer) that services Mortgage Loans on behalf of the Servicer or any Subservicer and is responsible for the performance (whether directly or through Subservicers or Subcontractors) of a substantial portion of the material servicing functions required to be performed by the Servicer under this Agreement that are identified in Item 1122(d) of Regulation AB.

Superior Lien: With respect to any Mortgage Loan, any other mortgage loan relating to the corresponding Mortgaged Property which creates a lien on the Mortgaged Property which is senior to the Mortgage Loan.

Transfer Date: The fifth Business Day of each month, or, if such day is not a Business Day, the next succeeding Business Day. Each transfer of servicing on a Transfer Date shall be deemed to be effective immediately following the close of business on such Transfer Date.

Trust Agreement: The Trust Agreement dated as of December 1, 2006, among the Trustee, the Master Servicer, the Depositor and the Credit Risk Manager.

Trust Fund: The trust fund established by the Trust Agreement, known as the “Structured Asset Securities Corporation Mortgage Loan Trust 2006-S4,” the assets of which consist of the Mortgage Loans and any related assets.

Trustee: Citibank, N.A. or any successor in interest, or if any successor trustee or co-trustee shall be appointed as provided in the Trust Agreement, then such successor trustee or such co-trustee, as the case may be.

Any capitalized terms used and not defined in this Agreement shall have the meanings ascribed to such terms in the Trust Agreement.

ARTICLE II.

SELLER’S ENGAGEMENT OF SERVICER TO PERFORM SERVICING

RESPONSIBILITIES

Section 2.01 Contract for Servicing; Possession of Servicing Files.

The Seller, by execution and delivery of this Agreement, does hereby contract with the Servicer, subject to the terms of this Agreement, for the servicing of the Mortgage Loans. On or before the Closing Date or Servicing Transfer Date, as applicable, the Seller shall cause to be delivered the Servicing Files with respect to the Mortgage Loans listed on the Mortgage Loan Schedule to the Servicer. Each Servicing File delivered to the Servicer shall be held in trust by the Servicer for the benefit of the Trustee; provided, however, that the Servicer shall have no liability for any Servicing Files (or portions thereof) not delivered by the Seller. The Servicer’s possession of any portion of the Mortgage Loan documents shall be at the will of the Trustee for the sole purpose of facilitating servicing of the related Mortgage Loan pursuant to this Agreement, and such retention and possession by the Servicer shall be in a custodial capacity only. The ownership of each Mortgage Note, Mortgage, and the contents of the Servicing File shall be vested in the Trustee and the ownership of all records and documents with respect to the related Mortgage Loan prepared by or which come into the possession of the Servicer shall immediately vest in the Trustee and shall be retained and maintained, in trust, by the Servicer at the will of the Trustee in such custodial capacity only. The portion of each Servicing File retained by the Servicer pursuant to this Agreement shall be segregated from the other books and records of the Servicer, which, except for collateral documents such as the Mortgage and the Mortgage Note, may be stored as imaged files, and shall be appropriately marked to clearly reflect the ownership of the related Mortgage Loan by the Trustee. The Servicer shall release from its custody the contents of any Servicing File retained by it only in accordance with this Agreement.

Section 2.02 Books and Records.

(a) Subject to Section 3.01(a) hereof, as soon as practicable after the Closing Date, the Servicing Transfer Date or the date on which a Qualifying Substitute Mortgage Loan is delivered pursuant to Section 2.05 of the Trust Agreement, as applicable (but in no event more than 90 days thereafter except to the extent delays are caused by the applicable recording office), the Servicer, at the expense of the Depositor, shall cause the Mortgage or Assignment of Mortgage, as applicable, with respect to each MERS Eligible Mortgage Loan, to be properly recorded in the name of MERS in the public recording office in the applicable jurisdiction, or shall ascertain that such have previously been so recorded.

(b) Subject to Section 3.01(a) hereof, an Assignment of Mortgage in favor of the Trustee shall be recorded as to each Non-MERS Mortgage Loan unless instructions to the contrary are delivered to the Servicer, in writing, by the Seller. Subject to the preceding sentence, as soon as practicable after the Closing Date or Servicing Transfer Date, as applicable (but in no event more than 90 days thereafter except to the extent delays are caused by the applicable recording office), the Servicer, at the expense of the Seller on behalf of the Depositor, shall cause to be properly recorded in each public recording office where such Non-MERS Eligible Mortgage Loans are recorded each Assignment of Mortgage. Notwithstanding the foregoing, the Servicer shall not cause to be recorded any Assignment which relates to a Mortgage Loan in a jurisdiction where the Rating Agencies do not require recordation; provided further, notwithstanding the foregoing, upon the occurrence of certain events set forth in the Trust Agreement, each such assignment of Mortgage shall be recorded by the Master Servicer as set forth in the Trust Agreement.

(c) Additionally, the Servicer shall prepare and execute any note endorsements relating to any of the Non-MERS Mortgage Loans.

(d) All rights arising out of the Mortgage Loans shall be vested in the Trustee, subject to the Servicer’s right to service and administer the Mortgage Loans hereunder in accordance with the terms of this Agreement. All funds received on or in connection with a Mortgage Loan, other than the General Servicing Fee and other compensation to which the Servicer is entitled as set forth herein, including but not limited to any and all servicing compensation pursuant to Section 5.01 below, shall be received and held by the Servicer in trust for the benefit of the Trustee pursuant to the terms of this Agreement.

(e) Any out-of-pocket costs incurred by the Servicer pursuant to this Section 2.02 and Section 3.01(a), including any recording or other fees in connection with the Servicer’s obtaining the necessary powers of attorney (and which are specified herein to be an expense of the Seller) shall be reimbursed to the Servicer by the Seller within five (5) Business Days of receipt by the Seller of an invoice for reimbursement. Neither the Trustee nor the Trust Fund shall have any obligation to reimburse the Seller for any such reimbursement made to the Servicer.

ARTICLE III.

SERVICING OF THE MORTGAGE LOANS

Section 3.01 Servicer to Service.

The Servicer, as an independent contractor, shall service and administer the Mortgage Loans from and after the Closing Date or Servicing Transfer Date, as applicable, and shall have full power and authority, acting alone, to do any and all things in connection with such servicing and administration which the Servicer may deem necessary or desirable, consistent with the terms of this Agreement and with Accepted Servicing Practices.

The Seller, the Master Servicer and the Servicer additionally agree that the Servicer has and will continue to fully furnish, in accordance with the Fair Credit Reporting Act of 1970, as amended (the “Fair Credit Reporting Act”) and its implementing regulations, accurate and complete information (e.g., favorable and unfavorable) on its borrower credit files to Equifax, Experian and Trans Union Credit Information Company (three of the credit repositories), on a monthly basis. In addition, with respect to any Mortgage Loan serviced for a Xxxxxx Xxx pool, the Servicer shall transmit full credit reporting data to each of such credit repositories in accordance with Xxxxxx Mae Guide Announcement 95-19 (November 11, 1995), a copy of which is attached hereto as Exhibit H, reporting each of the following statuses each month with respect to a Mortgage Loan in a Xxxxxx Xxx pool: new origination, current, delinquent (30-60-90-days, etc), foreclosed or charged off.

The Seller and the Servicer additionally agree as follows:

(a) The Servicer shall (A) record or cause to be recorded the Mortgage or the Assignment of Mortgage, as applicable, with respect to all MERS Eligible Mortgage Loans, in the name of MERS, or shall ascertain that such have previously been so recorded; (B) with the cooperation of the Trustee, take such actions as are necessary to cause the Trustee to be clearly identified as the owner of each MERS Mortgage Loan and each MERS Eligible Mortgage Loan on the records of MERS for purposes of the system of recording transfers of beneficial ownership of mortgages maintained by MERS; (iii) prepare or cause to be prepared all Assignments of Mortgage with respect to all Non-MERS Eligible Mortgage Loans; (C) record or cause to be recorded, subject to Section 2.02(b) hereof, all Assignments of Mortgage with respect to Non-MERS Mortgage Loans in the name of the Trustee; (D) pay the recording costs pursuant to Section 2.02 hereof; and/or (E) track such Mortgages and Assignments of Mortgage to ensure they have been recorded. The Servicer shall be entitled to be reimbursed by the Seller for the fees in connection with the preparation and recordation of the Mortgages and Assignments of Mortgage. After the fees and expenses of recording incurred by the Servicer pursuant to Section 2.02 and this Section 3.01(a) hereof shall have been paid by the Servicer, the Servicer shall submit to the Seller a reasonably detailed invoice for reimbursement of such costs and expenses.

(b) If applicable, the Servicer shall, in accordance with the relevant provisions of the Xxxxxxxx-Xxxxxxxx National Affordable Housing Act of 1990, as the same may be amended from time to time, and the regulations provided in accordance with the Real Estate Settlement Procedures Act, provide notice to the Mortgagor of each Mortgage Loan of the transfer of the servicing thereto to the Servicer.

(c) The Servicer shall be responsible for the preparation of and costs associated with notifications to Mortgagors of the assumption of servicing by the Servicer.

Consistent with the terms of this Agreement, the Servicer may waive any late payment charge, assumption fee or other fee (other than a Prepayment Charge) that may be collected in the ordinary course of servicing the Mortgage Loans. The Servicer shall not make any future advances to any obligor under any Mortgage Loan, and (unless the Mortgagor is in default with respect to the Mortgage Loan or such default is, in the judgment of the Servicer, reasonably foreseeable) the Servicer shall not permit any modification of any material term of any Mortgage Loan, including any modification that would change the Mortgage Interest Rate (other than for modifications relating to a Relief Act Reduction), defer or forgive the payment of principal or interest, reduce or increase the outstanding principal balance (except for actual payments of principal) or change the final maturity date on such Mortgage Loan. In the event of any such modification which permits the deferral of interest or principal payments on any Mortgage Loan, the Servicer shall, on the Business Day immediately preceding the Remittance Date in any month in which any such principal or interest payment has been deferred, make a Monthly Advance in accordance with Section 4.03 in an amount equal to the difference between (a) such month’s principal and one month’s interest at the Mortgage Loan Remittance Rate (or, at the Servicer’s option, at a rate equal to the related Mortgage Interest Rate minus the Aurora Servicing Fee Rate) on the unpaid principal balance of such Mortgage Loan and (b) the amount paid by the Mortgagor. The Servicer shall be entitled to reimbursement for such advances to the same extent as for all other advances made pursuant to Section 4.03. Without limiting the generality of the foregoing, the Servicer shall continue, and is hereby authorized and empowered, to execute and deliver on behalf of itself and the Trustee, all instruments of satisfaction or cancellation, or of partial or full release, discharge or note endorsements and all other comparable instruments, with respect to the Mortgage Loans and with respect to the Mortgaged Properties; provided, further, that upon the full release or discharge, the Servicer shall notify the related Custodian of the related Mortgage Loan of such full release or discharge. Upon the request of the Servicer, the Trustee shall execute and deliver to the Servicer any powers of attorney and other documents, furnished to it by the Servicer and reasonably satisfactory to the Trustee, necessary or appropriate to enable the Servicer to carry out its servicing and administrative duties under this Agreement; provided that the Trustee shall not be liable for the actions of the Servicer under such powers of attorney. Promptly after the execution of any assumption, modification, consolidation or extension of any Mortgage Loan, the Servicer shall forward to the Master Servicer copies of any documents evidencing such assumption, modification, consolidation or extension. Notwithstanding anything to the contrary contained in this Agreement, the Servicer shall not make or permit any modification, waiver or amendment of any term of any Mortgage Loan that would cause any REMIC created under the Trust Agreement to fail to qualify as a REMIC or result in the imposition of any tax under Section 860F(a) or Section 860G(d) of the Code.

The Servicer is authorized, without the prior approval of the Master Servicer or the Seller, to consent to the refinancing of any Superior Lien on Mortgaged Property, provided that (i) the resulting Combined Loan-to-Value Ratio of such Mortgage Loan is no higher than the Combined Loan-to-Value Ratio prior to such refinancing; (ii) the interest rate, or in the case of any Superior Lien which is an adjustable rate mortgage loan, the applicable maximum rate which can be charged under the related mortgage note is no more than 2.00% higher than the interest rate on the loan evidencing the existing Superior Lien immediately prior to the date of such refinancing; and (iii) the Mortgage Loan evidencing the Superior Lien is not subject to negative amortization.

The Servicer shall not without the Trustee’s written consent: (i) initiate any action, suit or proceedings solely under the Trustee’s name without indicating the Servicer’s, representative capacity or (ii) take any action with the intent to cause, and which actually does cause, the Trustee to be registered to do business in any state. The Servicer shall indemnify the Trustee for any and all costs, liabilities and expenses incurred by the Trustee in connection with the negligent or willful misuse of such powers of attorney by the Servicer.

Notwithstanding anything to the contrary in this Agreement, the Servicer shall not (unless the Servicer determines, in its own discretion, that there exists a situation of extreme hardship to the Mortgagor), waive any premium or penalty in connection with a prepayment of principal of any Mortgage Loan, and shall not consent to the modification of any Mortgage Note to the extent that such modification relates to payment of a Prepayment Charge except as provided in Section 3.19 hereof.

In servicing and administering the Mortgage Loans, the Servicer shall employ procedures (including collection procedures) and exercise the same care that it customarily employs and exercises in servicing and administering mortgage loans for its own account, giving due consideration to Accepted Servicing Practices where such practices do not conflict with the requirements of this Agreement, the Xxxxxx Xxx Guides, and the Master Servicer’s and the Seller’s reliance on the Servicer.

Section 3.02 Collection of Mortgage Loan Payments.

Continuously from the Closing Date or Servicing Transfer Date, as applicable, until the date that each Mortgage Loan ceases to be subject to this Agreement, the Servicer shall proceed diligently to collect all payments due under each of the Mortgage Loans when the same shall become due and payable and shall take special care in ascertaining and estimating Escrow Payments and all other charges that will become due and payable with respect to the Mortgage Loans and each related Mortgaged Property, to the end that the installments payable by the Mortgagors will be sufficient to pay such charges as and when they become due and payable. The Servicer shall also apply payments of interest and principal against any Simple Interest Mortgage Loans using the Simple Interest Method.

Section 3.03 Establishment of and Deposits to Custodial Account.

The Servicer shall segregate and hold all funds collected and received pursuant to the Mortgage Loans separate and apart from any of its own funds and general assets and shall establish and maintain one or more Custodial Accounts, in the form of time deposit or demand accounts, titled, as directed by the Master Servicer, “Aurora Loan Services LLC in trust for Citibank, N.A., as Trustee for the Structured Asset Securities Corporation Mortgage Loan Trust 2006-S4.” The Custodial Account shall be an Eligible Deposit Account established with an Eligible Institution. Any funds deposited in the Custodial Account may be invested in Eligible Investments subject to the provisions of Section 3.11 hereof. Funds deposited in the Custodial Account may be drawn on by the Servicer in accordance with Section 3.04. The creation of any Custodial Account shall be evidenced by a certification notice in the form of Exhibit B. A copy of such certification notice shall be furnished to the Master Servicer and, upon request, to any subsequent owner of the Mortgage Loans.

The Servicer shall deposit in the Custodial Account within two Business Days of receipt, and retain therein, the following collections received by the Servicer and payments made by the Servicer after the Cut-off Date (other than scheduled payments of principal and interest due on or before the Cut-off Date) or received by the Servicer prior to the Cut-off Date but allocable to the period subsequent thereto) or Servicing Transfer Date, as applicable:

(i) all payments on account of principal on the Mortgage Loans, including all Principal Prepayments;

(ii) all payments on account of interest on the Mortgage Loans adjusted to the Mortgage Loan Remittance Rate;

(iii) all Prepayment Charges or any Servicer Prepayment Charge Payment Amounts to be paid by the Servicer to the Trust Fund;

(iv) all Liquidation Proceeds;

(v) all Insurance Proceeds (other than amounts applied to the restoration or repair of the Mortgaged Property to be immediately released to the Mortgagor in accordance with Accepted Servicing Practices);

(vi) all Condemnation Proceeds that are not applied to the restoration or repair of the Mortgaged Property or released to the Mortgagor;

(vii) with respect to each Principal Prepayment in full or in part, the Prepayment Interest Shortfall Amount, if any, for the month of distribution, made from the Servicer’s own funds or from the Seller Remittance Amount, without reimbursement therefor up to a maximum amount per month of the General Servicing Fee actually received for the Mortgage Loans;

(viii) all Monthly Advances made by the Servicer pursuant to Section 4.03;

(ix) any amounts required to be deposited by the Servicer in connection with the deductible clause in any blanket hazard insurance policy;

(x) any amounts received with respect to or related to any REO Property or REO Disposition Proceeds;

(xi) any amounts required to be deposited by the Servicer pursuant to Section 3.07 in connection with any unpaid claims that are a result of a breach by the Servicer or any subservicer of the obligations hereunder or under the terms of a PMI Policy;

(xii) any amounts received by the Servicer under a PMI or LPMI Policy pursuant to Section 3.07;

(xiii) the Seller Remittance Amount; and

(xiv) any other amount required hereunder to be deposited by the Servicer in the Custodial Account.

The Servicer shall also deposit from its own funds into the Custodial Account, without the right to reimbursement, except from Net Simple Interest Excess, an amount equal to any Net Simple Interest Shortfall (to the extent not offset by Net Simple Interest Excess) for the related Due Period and remit such funds to the Master Servicer pursuant to Section 4.01.

The foregoing requirements for deposit into the Custodial Account shall be exclusive, it being understood and agreed that, without limiting the generality of the foregoing, payments in the nature of the Aurora Servicing Fee and Ancillary Income need not be deposited by the Servicer into the Custodial Account.

Any interest paid on funds deposited in the Custodial Account by the depository institution shall accrue to the benefit of the Servicer and the Servicer shall be entitled to retain and withdraw such interest from the Custodial Account pursuant to Section 3.04. Additionally, any other benefit derived from the Custodial Account associated with the receipt, disbursement and accumulation of principal, interest, taxes, hazard insurance, mortgage insurance, etc. shall accrue to the Servicer.

Section 3.04 Permitted Withdrawals From Custodial Account.

The Servicer shall, from time to time, withdraw funds from the Custodial Account for the following purposes:

(i) to make payments to the Master Servicer in the amounts and in the manner provided for in Section 4.01;

(ii) with respect to each LPMI Loan, in the amount of the related LPMI Fee, to make payments with respect to premiums for LPMI Policies in accordance with Section 3.07;

(iii) to deposit the Seller Remittance Amount into the collection account maintained by the Master Servicer for payment by the Master Servicer to the Seller on the next succeeding Distribution Date;

(iv) in the event the Servicer has elected not to retain the Aurora Servicing Fee out of any Mortgagor payments on account of interest or other recovery of interest with respect to a particular Mortgage Loan (including late collections of interest on such Mortgage Loan, or interest portions of Insurance Proceeds, Condemnation Proceeds or Liquidation Proceeds) prior to the deposit of such Mortgagor payment or recovery in the Custodial Account, to pay to itself the related Aurora Servicing Fee from all such Mortgagor payments on account of interest or other such recovery for interest with respect to that Mortgage Loan;

(v) to pay itself investment earnings on funds deposited in the Custodial Account;

(vi) to clear and terminate the Custodial Account upon the termination of this Agreement;

(vii) to transfer funds to another Eligible Institution in accordance with Section 3.11 hereof;

(viii) to invest funds in certain Eligible Investments in accordance with Section 3.11 hereof;

(ix) to reimburse itself to the extent of funds in the Custodial Account for Monthly Advances of the Servicer’s funds made pursuant to Section 4.03, the Servicer’s right to reimburse itself pursuant to this subclause (ix) with respect to any Mortgage Loan being limited to amounts received on or in respect of the related Mortgage Loan which represent late recoveries of payments of principal or interest with respect to which a Monthly Advance was made, it being understood that, in the case of any such reimbursement, the Servicer’s right thereto shall be prior to the rights of the Trust Fund, provided, however, that following the final liquidation of a Mortgage Loan, the Servicer may reimburse itself for previously unreimbursed Monthly Advances in excess of Liquidation Proceeds or Insurance Proceeds with respect to such Mortgage Loan from any funds in the Custodial Account, it being understood, in the case of any such reimbursement, that the Servicer’s right thereto shall be prior to the rights of the Trust Fund. The Servicer may recover at any time from amounts on deposit in the Custodial Account the amount of any Monthly Advances that the Servicer deems nonrecoverable or that remain unreimbursed to the Servicer from related Liquidation Proceeds after the final liquidation of the Mortgage Loan. In addition, at such time a Mortgage Loan becomes a Charged-off Loan, the Servicer may reimburse itself to the extent of funds held in the Custodial Account for all unreimbursed Aurora Servicing Fees, Servicing Advances and Monthly Advances owing to the Servicer relating to any Charged-off Loan accrued or advanced during any period prior to the date the Mortgage Loan became a Charged-off Loan;

(x) to reimburse itself for unreimbursed Servicing Advances, and for any unpaid Aurora Servicing Fees and to reimburse the Seller for any unpaid Seller Remittance Amount, the Servicer’s and the Seller’s respective rights to such reimbursement pursuant to this subclause (x) with respect to any Mortgage Loan being limited to related Liquidation Proceeds, Condemnation Proceeds, Insurance Proceeds, REO Disposition Proceeds and other amounts received in respect of the related REO Property, and such other amounts as may be collected by the Servicer from the Mortgagor or otherwise relating to the Mortgage Loan, it being understood that, in the case of any such reimbursement, the Servicer’s and the Seller’s right thereto shall be prior to the rights of the Trust Fund;

(xi) to reimburse itself for remaining unreimbursed Servicing Advances with respect to any defaulted Mortgage Loan as to which the Servicer has determined that all amounts that it expects to recover on behalf of the Trust Fund or on account of such Mortgage Loan has been recovered;

(xii) to pay itself an amount equal to the Net Simple Interest Excess for the related Due Period to the extent not offset by Net Simple Interest Shortfalls;

(xiii) to reimburse itself for expenses incurred or reimbursable to the Servicer pursuant to Sections 3.12 and 6.03 to the extent not previously reimbursed under clause (ix) of this Section 3.04; and

(xiv) to withdraw any funds deposited to the Custodial Account in error.

Section 3.05 Establishment of and Deposits to Escrow Account.

The Servicer shall segregate and hold all funds collected and received pursuant to a Mortgage Loan constituting Escrow Payments separate and apart from any of its own funds and general assets and shall establish and maintain one or more Escrow Accounts, in the form of time deposit or demand accounts, titled, as directed by the Master Servicer, “Aurora Loan Services LLC in trust for Citibank, N.A., as Trustee for the Structured Asset Securities Corporation Mortgage Loan Trust 2006-S4.” Each Escrow Account shall be an Eligible Deposit Account established with an Eligible Institution in a manner that shall provide maximum available insurance thereunder. Funds deposited in the Escrow Account may be drawn on by the Servicer in accordance with Section 3.06. The creation of any Escrow Account shall be evidenced by a certification notice in the form of Exhibit C. A copy of such certification notice shall be furnished to the Master Servicer and, upon request, to any subsequent owner of the Mortgage Loans.

The Servicer shall deposit in the Escrow Account or Accounts on a daily basis, and retain therein:

(i) all Escrow Payments collected on account of the Mortgage Loans, for the purpose of effecting timely payment of any such items as required under the terms of this Agreement; and

(ii) all amounts representing Insurance Proceeds or Condemnation Proceeds that are to be applied to the restoration or repair of any Mortgaged Property.

The Servicer shall make withdrawals from the Escrow Account only to effect such payments as are required under this Agreement, as set forth in Section 3.06. The Servicer shall retain any interest paid on funds deposited in the Escrow Account by the depository institution, other than interest on escrowed funds required by law to be paid to the Mortgagor. Additionally, any other benefit derived from the Escrow Account associated with the receipt, disbursement and accumulation of principal, interest, taxes, hazard insurance, mortgage insurance, etc. shall accrue to the Servicer. To the extent required by law, the Servicer shall pay interest on escrowed funds to the Mortgagor notwithstanding that the Escrow Account may be non-interest bearing or that interest paid thereon is insufficient for such purposes.

Section 3.06 Permitted Withdrawals From Escrow Account.

Withdrawals from the Escrow Account or Accounts may be made by the Servicer only:

(i) to effect timely payments of ground rents, taxes, assessments, water rates, sewer rents, mortgage insurance premiums, condominium charges, fire and hazard insurance premiums or other items constituting Escrow Payments for the related Mortgage;

(ii) to refund to any Mortgagor any funds found to be in excess of the amounts required under the terms of the related Mortgage Loan;

(iii) for transfer to the Custodial Account and application to reduce the principal balance of the Mortgage Loan in accordance with the terms of the related Mortgage and Mortgage Note;

(iv) to reimburse the Servicer for any Servicing Advance made by the Servicer with respect to a related Mortgage Loan, but only from amounts received on the related Mortgage Loan which represent late collections of Escrow Payments;

(v) for application to restoration or repair of the Mortgaged Property in accordance with Xxxxxx Mae Guides or other similar prudent accepted servicing practices;

(vi) to pay to the Servicer, or any Mortgagor to the extent required by law, any interest paid on the funds deposited in the Escrow Account;

(vii) to withdraw any funds inadvertently deposited into the Escrow Account by the Servicer in error; and

(viii) to clear and terminate the Escrow Account on the termination of this Agreement.

Section 3.07 Maintenance of PMI Policy and/or LPMI Policy; Claims.

(a) The Servicer shall comply with all provisions of applicable state and federal law relating to the cancellation of, or collection of premiums with respect to, PMI Policies, including, but not limited to, the provisions of the Homeowners Protection Act of 1998, and all regulations promulgated thereunder, as amended from time to time. The Servicer shall be obligated to make premium payments with respect to (a) LPMI Policies, to the extent of the LPMI Fee set forth on the Mortgage Loan Schedule with respect to any LPMI Loans, and (b) in the case of PMI Policies required to be maintained by the Mortgagor rather than the Seller or the Trust Fund, if the Mortgagor is required but fails to pay any PMI Policy premium, such PMI Policy.

With respect to each Mortgage Loan (other than LPMI Loans) with a loan-to-value ratio at origination in excess of 80%, the Servicer shall maintain or cause the Mortgagor to maintain (to the extent that the Mortgage Loan requires the Mortgagor to maintain such insurance) in full force and effect a PMI Policy, and shall pay or shall cause the Mortgagor to pay the premium thereon on a timely basis, until the LTV of such Mortgage Loan is reduced to 80%. In the event that such PMI Policy shall be terminated, the Servicer shall obtain from another Qualified Insurer a comparable replacement policy, with a total coverage equal to the remaining coverage of such terminated PMI Policy, at substantially the same fee level. The Servicer shall not take any action which would result in noncoverage under any applicable PMI Policy of any loss which, but for the actions of the Servicer would have been covered thereunder. In connection with any assumption or substitution agreements entered into or to be entered into with respect to a Mortgage Loan, the Servicer shall promptly notify the insurer under the related PMI Policy, if any, of such assumption or substitution of liability in accordance with the terms of such PMI Policy and shall take all actions which may be required by such insurer as a condition to the continuation of coverage under such PMI Policy. If such PMI Policy is terminated as a result of such assumption or substitution of liability, the Servicer shall obtain a replacement PMI Policy as provided above.

(b) With respect to each Mortgage Loan covered by a PMI Policy or LPMI Policy, the Servicer shall take all such actions on behalf of the Trustee as are necessary to service, maintain and administer the related Mortgage Loan in accordance with either such policy and to enforce the rights under such policy. Except as expressly set forth herein, the Servicer shall have full authority on behalf of the Trust Fund to do anything it deems appropriate or desirable in connection with the servicing, maintenance and administration of such policy; provided that the Servicer shall not take, or permit any subservicer to modify or assume, a Mortgage Loan covered by a LPMI Policy or PMI Policy or take any other action with respect to such Mortgage Loan which would result in non-coverage under such policy of any loss which, but for actions of the Servicer or the subservicers, would have been covered thereunder. If the Qualified Insurer fails to pay a claim under a LPMI Policy or PMI Policy as a result of a breach by the Servicer or subservicer of its obligations hereunder or under either such policy, the Servicer shall be required to deposit in the Custodial Account on or prior to the next succeeding Remittance Date an amount equal to such unpaid claim from its own funds without any rights to reimbursement from the Trust Fund. The Servicer shall cooperate with the Qualified Insurers and shall use its Best Efforts to furnish all reasonable evidence and information in the possession of the Servicer to which the Servicer has access with respect to the related Mortgage Loan; provided, however, notwithstanding anything to the contrary contained in and LPMI Policy or PMI Policy, the Servicer shall not be required to submit any reports to the related Qualified Insurer until a reporting date that is at least 15 days after the Servicer has received sufficient loan level information from the Seller to appropriately code its servicing systems in accordance with the Qualified Insurer’s requirements.

(c) In connection with its activities as servicer, the Servicer agrees to prepare and present, on behalf of itself and the Trustee, claims to the Qualified Insurer under any PMI Policy or LPMI Policy in a timely fashion in accordance with the terms of such PMI Policy or LPMI Policy and, in this regard, to take such action as shall be necessary to permit recovery under any PMI Policy or LPMI Policy respecting a defaulted Mortgage Loan. Any amounts collected by the Servicer under any PMI Policy or LPMI Policy shall be deposited in the Custodial Account pursuant to Section 3.03(xii), subject to withdrawal pursuant to Section 3.04.

(d) The Trustee shall furnish the Servicer with any powers of attorney and other documents (within three (3) Business Days upon request from the Servicer) in form as acceptable to it necessary or appropriate to enable the Servicer to service and administer any PMI or LPMI Policy; provided, however, that the Trustee shall not be liable for the actions of the Servicer under such power of attorney.

Section 3.08 Fidelity Bond and Errors and Omissions Insurance.

The Servicer shall keep in force during the term of this Agreement a Fidelity Bond and Errors and Omissions Insurance Policy. Such Fidelity Bond and Errors and Omissions Insurance Policy shall be maintained with recognized insurers and shall be in such form and amount as would permit the Servicer to be qualified as a Xxxxxx Xxx or Xxxxxxx Mac seller-servicer and shall by its terms not be cancelable without thirty days’ prior written notice to the Master Servicer. The Servicer shall be deemed to have complied with this provision if an affiliate of the Servicer has such errors and omissions and fidelity bond coverage and, by the terms of such insurance policy or fidelity bond, the coverage afforded thereunder extends to the Servicer. The Servicer shall furnish to the Master Servicer a copy of each such bond and insurance policy if (i) the Master Servicer so requests and (ii) the Servicer is not an affiliate of Xxxxxx Brothers Inc. at the time of such request.

Section 3.09 Reserved.

Section 3.10 Completion and Recordation of Assignments of Mortgage.

As soon as practicable after the Closing Date, the Servicing Transfer Date or the date on which a Qualifying Substitute Mortgage Loan is delivered pursuant to Section 2.05 of the Trust Agreement, as applicable (but in no event more than 90 days thereafter except to the extent delays are caused by the applicable public recording office), the Servicer shall cause the endorsements on the Mortgage Note (if applicable) and the Assignments of Mortgage (subject to Section 3.01(a)), to be completed in the name of the Trustee (or MERS, as applicable).

Section 3.11 Protection of Accounts.

The Servicer may transfer any Custodial Account or any Escrow Account to a different Eligible Institution from time to time, provided that in the event the Custodial Account or any Escrow Account is held in a depository institution or trust company that ceases to be an Eligible Institution, the Servicer shall transfer such Custodial Account or Escrow Account, as the case may be, to an Eligible Institution. The Servicer shall give notice to the Master Servicer of any change in the location of the Custodial Account no later than 30 days after any such transfer is made and deliver to the Master Servicer a certification notice in the form of Exhibit B or Exhibit C, as applicable, with respect to such Eligible Institution.

The Servicer shall bear any expenses, losses or damages sustained by the Master Servicer or the Trustee if the Custodial Account and/or the Escrow Account are not demand deposit accounts.

Amounts on deposit in the Custodial Account and the Escrow Account may at the option of the Servicer be invested in Eligible Investments. Any such Eligible Investment shall mature no later than the Business Day immediately preceding the related Remittance Date; provided, however, that if such Eligible Investment is an obligation of an Eligible Institution (other than the Servicer) that maintains the Custodial Account or the Escrow Account, then such Eligible Investment may mature on the related Remittance Date. Any such Eligible Investment shall be made in the name of the Servicer in trust for the benefit of the Trustee. All income on or gain realized from any such Eligible Investment shall be for the benefit of the Servicer and may be withdrawn at any time by the Servicer. Any losses incurred in respect of any such investment shall be deposited in the Custodial Account or the Escrow Account, by the Servicer out of its own funds immediately as realized.

Section 3.12 Payment of Taxes, Insurance and Other Charges.

With respect to each Mortgage Loan which provides for Escrow Payments, the Servicer shall maintain accurate records reflecting the status of ground rents, taxes, assessments, water rates, sewer rents, and other charges which are or may become a lien upon the Mortgaged Property and the status of PMI Policy and LPMI Policy (if any) premiums and fire and hazard insurance coverage and shall obtain, from time to time, all bills for the payment of such charges (including renewal premiums) and shall effect payment thereof prior to the applicable penalty or termination date, employing for such purpose deposits of the Mortgagor in the Escrow Account which shall have been estimated and accumulated by the Servicer in amounts sufficient for such purposes, as allowed under the terms of the Mortgage. The Servicer shall not be required to maintain records with respect to the payment of the LPMI Premiums unless the Servicer shall be required to make payment of such premiums and such requirements shall be indicated on the Mortgage Loan Schedule with respect to each applicable Mortgage Loan. The Servicer assumes full responsibility for the timely payment of all such bills, shall effect timely payment of all such charges irrespective of each Mortgagor’s faithful performance in the payment of same or the making of the Escrow Payments, and shall make advances from its own funds to effect such payments. With regard to any Mortgage Loans for which the Mortgagor is not required to escrow Escrow Payments with the Servicer, the Servicer shall use reasonable efforts consistent with Accepted Servicing Practices to determine that any such payments are made by the Mortgagor at the time they first became due and shall insure that the Mortgaged Property is not lost to a tax lien as a result of nonpayment and that such Mortgage is not left uninsured and shall make advances from its own funds to effect any such delinquent payments to avoid the lapse of insurance coverage on the Mortgaged Property or to avoid the imposition of a tax lien.

Section 3.13 Maintenance of Hazard Insurance.

The Servicer shall cause to be maintained for each Mortgage Loan, with a generally acceptable insurer, fire and hazard insurance of extended coverage on the related Mortgaged Property, in an amount which is at least equal to the greater of (i) the then outstanding principal balance of the Mortgage Loan and (ii) an amount such that the proceeds thereof shall be sufficient to prevent the Mortgagor or the loss payee from becoming a co-insurer. It is understood and agreed that no earthquake or other additional insurance is required to be maintained by the Servicer in connection with any Mortgage Loan or Mortgaged Property, other than pursuant to applicable laws and regulations that require the Servicer to cause such additional insurance to be maintained.

Section 3.14 Maintenance of Mortgage Impairment Insurance.

In the event that the Servicer shall obtain and maintain a blanket policy (a “Mortgage Impairment Insurance Policy”) insuring against losses arising from fire and hazards covered under extended coverage on all of the Mortgage Loans, then, to the extent such Mortgage Impairment Insurance Policy provides coverage in an amount equal to the amount required pursuant to Section 3.13 and otherwise complies with all other requirements of Section 3.13, it shall conclusively be deemed to have satisfied its obligations as set forth in Section 3.13. Any amounts collected by the Servicer under any such Mortgage Impairment Insurance Policy relating to a Mortgage Loan shall be deposited in the Custodial Account or Escrow Account subject to withdrawal pursuant to Section 3.04 or 3.06. Such Mortgage Impairment Insurance Policy may contain a deductible clause, in which case, in the event that there shall not have been maintained on the related Mortgaged Property a policy complying with Section 3.13, and there shall have been a loss which would have been covered by such policy, the Servicer shall deposit in the Custodial Account at the time of such loss the amount not otherwise payable under such blanket policy because of such deductible clause, such amount to deposited from the Servicer’s funds, without reimbursement therefor.

Section 3.15 Restoration of Mortgaged Property.

The Servicer need not obtain the approval of the Trustee or the Master Servicer prior to releasing any Insurance Proceeds or Condemnation Proceeds to the Mortgagor to be applied to the restoration or repair of the Mortgaged Property if such release is in accordance with Accepted Servicing Practices. At a minimum, with respect to claims greater than $10,000, the Servicer shall comply with the following conditions in connection with any such release of Insurance Proceeds or Condemnation Proceeds:

(i) the Servicer shall receive satisfactory independent verification of completion of repairs and issuance of any required approvals with respect thereto;

(ii) the Servicer shall take all steps necessary to preserve the priority of the lien of the Mortgage, including, but not limited to requiring waivers with respect to mechanics’ and materialmen’s liens;

(iii) the Servicer shall verify that the Mortgage Loan is not 60 or more days Delinquent; and

(iv) pending repairs or restoration, the Servicer shall place the Insurance Proceeds or Condemnation Proceeds in the Escrow Account.

With respect to claims of $10,000 or less, the Servicer shall comply with the following conditions in connection with any such release of Insurance Proceeds or Condemnation Proceeds:

(v) the related Mortgagor shall provide an affidavit verifying the completion of repairs and issuance of any required approvals with respect thereto;

(vi) the Servicer shall verify the total amount of the claim with the applicable insurance company; and

(vii) the Servicer shall verify that the Mortgage Loan is not 60 or more days delinquent. If the account is 60 or more days delinquent, pending repairs or restoration, the Servicer shall place the Insurance Proceeds or Condemnation Proceeds in the Escrow Account.

Section 3.16 Title, Management and Disposition of REO Property.

In the event that title to any Mortgaged Property is acquired in foreclosure or by deed in lieu of foreclosure, the deed or certificate of sale shall be taken in the name of the Trustee or its nominee (or MERS, as applicable, provided however that if the Servicer deems it to be in the best interest of the Trustee, the Servicer may take title in the name of a person or persons other than MERS), or in the event the Trustee is not authorized or permitted to hold title to real property in the state where the REO Property is located, or would be adversely affected under the “doing business” or tax laws of such state by so holding title, the deed or certificate of sale shall be taken in the name of such Person or Persons as shall be consistent with an Opinion of Counsel obtained by the Servicer (with a copy delivered to the Trustee) from any attorney duly licensed to practice law in the state where the REO Property is located. The Person or Persons holding such title other than the Trustee shall acknowledge in writing that such title is being held as nominee for the Trustee.

The Servicer shall manage, conserve, protect and operate each REO Property for the Trustee solely for the purpose of its prompt disposition and sale. The Servicer, either itself or through an agent selected by the Servicer, shall manage, conserve, protect and operate the REO Property in the same manner that it manages, conserves, protects and operates other foreclosed property for its own account, and in the same manner that similar property in the same locality as the REO Property is managed. The Servicer shall attempt to sell the same (and may temporarily rent the same for a period not greater than one year, except as otherwise provided below) on such terms and conditions as the Servicer deems to be in the best interest of the Trustee and the Trust Fund. If the Servicer determines that it is in the best interest of the Trustee and the Trust Fund to not proceed with foreclosure or accept a deed in lieu of foreclosure, the Servicer shall have the right to do so, whereupon the related Mortgage Loan shall be deemed to be finally liquidated and the Servicer shall have the right to release the lien of the Mortgage on the related Mortgage Property and the Servicer shall be entitled to reimbursement for all outstanding unreimbursed Servicing Advances and Monthly Advances from the Custodial Account in accordance with Section 3.04(ix).

The Servicer may permit an obligor to pay off a non-performing Mortgage Loan at less than its unpaid principal balance or charge off all or a portion of such non-performing Mortgage Loan if such discounted payoff or charge off is in accordance with Accepted Servicing Practices and the Servicer believes that such discounted payoff or charge off is in the best interest of the Trust Fund; provided that in the case of any proposed discounted payoff or proposed charge off, the Servicer shall notify the Master Servicer, by telecopy and telephone, of the proposed discounted payoff or proposed charge off of any Mortgage Loan. The Master Servicer shall be deemed to have approved the discounted payoff or charge off of any Mortgage Loan unless the Master Servicer notifies the Servicer in writing, within five (5) Business Days after its receipt of the related notice, that it disapproves of the discounted payoff or charge off, in which case the Servicer shall not proceed with such discounted payoff or charge off.

Notwithstanding anything to the contrary contained in this Section 3.16, in connection with a foreclosure or acceptance of a deed in lieu of foreclosure, in the event the Servicer has reasonable cause to believe that a Mortgaged Property is contaminated by hazardous or toxic substances or wastes, or if the Master Servicer otherwise requests, an environmental inspection or review of such Mortgaged Property to be conducted by a qualified inspector shall be arranged by the Servicer. Upon completion of the inspection, the Servicer shall provide the Master Servicer with a written report of such environmental inspection. In the event that the environmental inspection report indicates that the Mortgaged Property is contaminated by hazardous or toxic substances or wastes, the Servicer shall not proceed with foreclosure or acceptance of a deed in lieu of foreclosure. In the event that the environmental inspection report is inconclusive as to the whether or not the Mortgaged Property is contaminated by hazardous or toxic substances or wastes, the Servicer shall not, without the prior approval of the Master Servicer, proceed with foreclosure or acceptance of a deed in lieu of foreclosure. In such instance, the Master Servicer shall be deemed to have approved such foreclosure or acceptance of a deed in lieu of foreclosure unless either party notifies the Servicer in writing, within two (2) Business Days after its receipt of written notice of the proposed foreclosure or deed in lieu of foreclosure from the Servicer, that it disapproves of the related foreclosure or acceptance of a deed in lieu of foreclosure. The Servicer shall be reimbursed for all Servicing Advances made pursuant to this paragraph with respect to the related Mortgaged Property from the Custodial Account.

Subject to the approval of the Master Servicer as described in this paragraph, the disposition of REO Property shall be carried out by the Servicer at such price, and upon such terms and conditions, as the Servicer deems to be in the best interests of the Trust Fund. Prior to acceptance by the Servicer of an offer to sell any REO Property, the Servicer shall notify the Master Servicer of such offer in writing which notification shall set forth all material terms of said offer (each a “Notice of Sale”). The Master Servicer shall be deemed to have approved the sale of any REO Property unless either notifies the Servicer in writing, within 2 Business Days after its receipt of the related Notice of Sale, that it disapproves of the related sale, in which case the Servicer shall not proceed with such sale. With respect to any REO Property, upon a REO Disposition, the Servicer shall be entitled to retain from REO Disposition Proceeds a disposition fee equal to $1,500.

In the event that the Trust Fund acquires any REO Property in connection with a default or imminent default on a Mortgage Loan, the Servicer shall dispose of such REO Property not later than the end of the third taxable year after the year of its acquisition by the Trust Fund unless the Servicer has applied for and received a grant of extension from the Internal Revenue Service (and provide a copy of the same to the Trustee) to the effect that, under the REMIC Provisions and any relevant proposed legislation and under applicable state law, the applicable Trust REMIC may hold REO Property for a longer period without adversely affecting the REMIC status of such REMIC or causing the imposition of a federal or state tax upon such REMIC. If the Servicer has received such an extension (and provided a copy of the same to the Trustee), then the Servicer shall continue to attempt to sell the REO Property for its fair market value for such period longer than three years as such extension permits (the “Extended Period”). If the Servicer has not received such an extension and the Servicer is unable to sell the REO Property within the period ending 3 months before the end of such third taxable year after its acquisition by the Trust Fund or if the Servicer has received such an extension, and the Servicer is unable to sell the REO Property within the period ending three months before the close of the Extended Period, the Servicer shall, before the end of the three-year period or the Extended Period, as applicable, (i) purchase such REO Property at a price equal to the REO Property’s fair market value or (ii) auction the REO Property to the highest bidder (which may be the Servicer) in an auction reasonably designed to produce a fair price prior to the expiration of the three-year period or the Extended Period, as the case may be. The Trustee shall sign any document or take any other action reasonably requested by the Servicer which would enable the Servicer, on behalf of the Trust Fund, to request such grant of extension.

Notwithstanding any other provisions of this Agreement, no REO Property acquired by the Trust Fund shall be rented (or allowed to continue to be rented) or otherwise used by or on behalf of the Trust Fund in such a manner or pursuant to any terms that would: (i) cause such REO Property to fail to qualify as “foreclosure property” within the meaning of Section 860G(a)(8) of the Code; or (ii) subject any Trust REMIC to the imposition of any federal income taxes on the income earned from such REO Property, including any taxes imposed by reason of Sections 860F or 860G(c) of the Code, unless the Servicer has agreed to indemnify and hold harmless the Trust Fund with respect to the imposition of any such taxes.

The Servicer shall also maintain on each REO Property fire and hazard insurance with extended coverage in amount which is at least equal to the maximum insurable value of the improvements which are a part of such property, liability insurance and, to the extent required and available under the Flood Disaster Protection Act of 1973, as amended, flood insurance in the amount required above.

The Servicer shall withdraw from the Custodial Account funds necessary for the proper operation, management and maintenance of the REO Property, including the cost of maintaining any hazard insurance pursuant to the Xxxxxx Xxx Guides. The Servicer shall make monthly distributions on each Remittance Date to the Master Servicer of the net cash flow from the REO Property (which shall equal the revenues from such REO Property net of the expenses described in this Section 3.16 and of any reserves reasonably required from time to time to be maintained to satisfy anticipated liabilities for such expenses).

Section 3.17 Real Estate Owned Reports.

Together with the statement furnished pursuant to Section 4.02, the Servicer shall furnish to the Master Servicer on or before the Remittance Date each month a statement with respect to any REO Property covering the operation of such REO Property for the previous month and the Servicer’s efforts in connection with the sale of such REO Property and any rental of such REO Property incidental to the sale thereof for the previous month. That statement shall be accompanied by such other information as the Master Servicer shall reasonably request.

Section 3.18 MERS.

(a) The Servicer shall use its Best Efforts to cause the Trustee to be identified as the owner of each MERS Mortgage Loan on the records of MERS for purposes of the system of recording transfers of beneficial ownership of mortgages maintained by MERS.

(b) The Servicer shall maintain in good standing its membership in MERS. In addition, the Servicer shall comply with all rules, policies and procedures of MERS, including the Rules of Membership, as amended, and the MERS Procedures Manual, as amended. If the Servicer fails to maintain its membership in MERS in good standing, or otherwise elects to terminate its membership in MERS, the costs associated with termination of such membership shall be borne by the Servicer.

(c) With respect to all MERS Mortgage Loans serviced hereunder, the Servicer shall promptly notify MERS as to any transfer of beneficial ownership in such Mortgage Loans of which the Servicer has notice.

(d) With respect to all MERS Mortgage Loans serviced hereunder, the Servicer shall notify MERS as to any transfer of servicing pursuant to Section 9.01 within 10 Business Days of such transfer of servicing. The Servicer shall cooperate with the Trustee, the Master Servicer and any successor Servicer to the extent necessary to ensure that such transfer of servicing is appropriately reflected on the MERS system.

Section 3.19 Waiver of Prepayment Charges.

Except as provided below, the Servicer or any designee of the Servicer shall not waive any Prepayment Charge with respect to any Mortgage Loan. If the Servicer or its designee fails to collect a Prepayment Charge at the time of the related prepayment of any Mortgage Loan subject to such Prepayment Charge, the Servicer shall pay to the Trust Fund at such time (by deposit to the Custodial Account) an amount equal to the amount of the Prepayment Charge not collected; provided, however, the Servicer shall not have any obligation to pay the amount of any uncollected Prepayment Charge under this Section 3.19 if the failure to collect such amount is the result of inaccurate or incomplete information on the Prepayment Charge Schedule provided by LBH and which is included as part of the Mortgage Loan Schedule. Notwithstanding the above, the Servicer or its designee may waive (and shall waive, in the case of (iii) below) a Prepayment Charge without paying to the Trust Fund the amount of such Prepayment Charge only if the related prepayment is not the result of a refinancing by the Servicer or its designee and such waiver (i) relates to a defaulted Mortgage Loan or a reasonably foreseeable default, such waiver is standard and customary in servicing similar mortgage loans to the Mortgage Loans, and such waiver, in the reasonable judgment of the Servicer, would maximize recovery of total proceeds from the Mortgage Loan, taking into account the amount of such Prepayment Charge and the related Mortgage Loan, (ii) relates to a Prepayment Charge the collection of which, in the reasonable judgment of the Servicer, would be a violation of applicable laws or (iii) notwithstanding any state or federal law to the contrary, any Prepayment Charge in any instance when a Mortgage Loan is in foreclosure.

Section 3.20 Safeguarding Customer Information.

The Servicer has implemented and will maintain security measures designed to meet the objectives of the Interagency Guidelines Establishing Standards for Safeguarding Customer Information published in final form on February 1, 2001, 66 Fed. Reg. 8616 and the rules promulgated thereunder, as amended from time to time (the “Guidelines”).

The Servicer shall promptly provide the Master Servicer and the Trustee information reasonably available to it regarding such security measures upon the reasonable request of the Master Servicer and the Trustee which information shall include, but not be limited to, any Statement on Auditing Standards (SAS) No. 70 report covering the Servicer’s operations, and any other audit reports, summaries of test results or equivalent measures taken by the Servicer with respect to its security measures to the extent reasonably necessary in order for the Seller to satisfy its obligations under the Guidelines.

ARTICLE IV.

PAYMENTS TO MASTER SERVICER

Section 4.01 Remittances.

On each Remittance Date, no later than 3:00 p.m. New York City time, the Servicer shall remit on a scheduled/scheduled basis by wire transfer of immediately available funds to the Master Servicer (i) all amounts deposited in the Custodial Account as of the close of business on the last day of the related Due Period (net of charges against or withdrawals from the Custodial Account pursuant to Section 3.04), plus (ii) all Monthly Advances, if any, which the Servicer is obligated to remit pursuant to Section 4.03 (and which the Servicer has not already deposited in the Custodial Agreement pursuant to Section 3.03(viii)), plus (iii) the amount of any Net Simple Interest Shortfall not offset by Net Simple Interest Excess for the related Due Period; minus (iv) any amounts attributable to Principal Prepayments, Liquidation Proceeds, Insurance Proceeds, Condemnation Proceeds or REO Disposition Proceeds received after the applicable Prepayment Period, which amounts shall be remitted on the following Remittance Date, together with any additional interest required to be deposited in the Custodial Account in connection with such Principal Prepayment in accordance with Section 3.03(vii), and minus (iv) any amounts attributable to Monthly Payments collected but due on a Due Date or Due Dates subsequent to the first day of the month in which such Remittance Date occurs, which amounts shall be remitted on the Remittance Date next succeeding the Due Date related to such Monthly Payment.

With respect to any remittance received by the Master Servicer after the Business Day on which such payment was due, the Servicer shall pay to the Master Servicer interest on any such late payment at an annual rate equal to the Prime Rate, adjusted as of the date of each change, plus two (2) percentage points, but in no event greater than the maximum amount permitted by applicable law. Such interest shall be deposited in the Custodial Account by the Servicer on the date such late payment is made and shall cover the period commencing with the day following such Business Day and ending with the Business Day on which such payment is made, both inclusive. Such interest shall be remitted along with the distribution payable on the next succeeding Remittance Date. The payment by the Servicer of any such interest shall not be deemed an extension of time for payment or a waiver by the Trustee or the Master Servicer of any Event of Default.

All remittances required to be made to the Master Servicer shall be made to the following wire account or to such other account as may be specified by the Master Servicer from time to time:

Bank of New York

New York, NY

ABA: 000-000-000

Account Name: Aurora Loan Services LLC

Master Servicing Payment Clearing Account

Account Number: 8900620730

Beneficiary: Aurora Loan Services LLC

REF: SASCO 2006-S4

Section 4.02 Statements to Master Servicer.

(a) Not later than the tenth calendar day of each month (or if such calendar day is not a Business Day, the immediately preceding Business Day), the Servicer shall furnish to the Master Servicer (i) a monthly remittance advice in the format set forth in Exhibit D-1 hereto and a monthly defaulted loan report in the format set forth in Exhibit D-2 hereto (or in such other format mutually agreed between the Servicer and the Master Servicer) relating to the period ending on the last day of the preceding calendar month and a monthly loan loss report in the format set forth in Exhibit D-3 hereto and (ii) all such information required pursuant to clause (i) above on a magnetic tape or other similar media reasonably acceptable to the Master Servicer and the Servicer, whose agreement shall not be unreasonably withheld. The format of this monthly reporting may be amended from time to time to the extent necessary to comply with applicable law.

Such monthly remittance advice shall also be accompanied with a supplemental report provided to the Master Servicer and the Seller which includes on an aggregate basis for the previous Due Period (i) the amount of claims filed, (ii) the amount of any claim payments made, (iii) the amount of claims denied or curtailed and (iv) policies cancelled with respect to those Mortgage Loans covered by any PMI Policy purchased by the Seller on behalf of the Trust Fund; provided, however, notwithstanding anything to the contrary contained in a PMI Policy, the Servicer shall not be required to submit any supplemental reports including the foregoing data with respect to any such PMI Policy until a reporting date that is at least 15 days after the Servicer has received sufficient loan level information from the Seller to appropriately code its servicing system in accordance with requirements.

(b) In addition, not more than 60 days after the end of each calendar year, commencing December 31, 2006, the Servicer shall provide (as such information becomes reasonably available to the Servicer) to the Master Servicer and the Trustee such information concerning the Mortgage Loans and annual remittances to the Master Servicer therefrom as is necessary for the Trustee to prepare the Trust Fund’s federal income tax return and for any investor in the Certificates to prepare any required tax return. Such obligation of the Servicer shall be deemed to have been satisfied to the extent that substantially comparable information shall be provided by the Servicer to the Master Servicer and the Trustee pursuant to any requirements of the Code as from time to time are in force. The Servicer shall also provide to the Trustee such information as may be requested by it and required for the completion of any tax reporting responsibility of the Trustee within such reasonable time frame as shall enable the Trustee to timely file each Schedule Q (or other applicable tax report or return) required to be filed by it.

(c) The Servicer shall promptly notify the Trustee, the Master Servicer and the Depositor (i) of any legal proceedings pending against the Servicer of the type described in Item 1117 (§ 229.1117) of Regulation AB and (ii) if the Servicer shall become (but only to the extent not previously disclosed to the Master Servicer and the Depositor) at any time an affiliate of any of the parties listed on Exhibit K to this Agreement.

If so requested by the Trustee, the Master Servicer or the Depositor on any date following the date on which information was first provided to the Trustee and the Depositor pursuant to the preceding sentence, the Servicer shall use its reasonable best efforts, within five (5) Business Days, but in no event later than ten (10) Business Days following such request, to confirm in writing the accuracy of the representations and warranties set forth in Section 6.01(k) or, if such a representation and warranty is not accurate as of the date of such request, to provide reasonable adequate disclosure of the pertinent facts, in writing, to the requesting party.

The Servicer shall provide to the Trustee, the Master Servicer and the Depositor prompt notice of the occurrence of any of the following: any event of default under the terms of this Agreement, any merger, consolidation or sale of substantially all of the assets of the Servicer, the Servicer’s engagement of any Subservicer, Subcontractor or vendor to perform or assist in the performance of any of the Servicer’s obligations under this Agreement, any material litigation involving the Servicer, and any affiliation or other significant relationship between the Servicer and other transaction parties.

(d) Not later than the tenth calendar day of each month (or if such calendar day is not a Business Day, the immediately preceding Business Day), the Servicer shall provide to the Master Servicer notice of the occurrence of any material modifications, extensions or waivers of terms, fees, penalties or payments relating to the Mortgage Loans during the related Due Period or that have cumulatively become material over time (Item 1121(a)(11) of Regulation AB) along with all information, data, and materials related thereto as may be required to be included in the related Distribution Report on Form 10-D.

Section 4.03 Monthly Advances by Servicer.

On the Business Day immediately preceding each Remittance Date, the Servicer shall deposit in the Custodial Account from its own funds or from amounts held for future distribution, or both, an amount equal to all Monthly Payments (in the case of Simple Interest Mortgage Loans, solely the portion of the Monthly Payment attributable to interest) which were due on the Mortgage Loans during the applicable Due Period and which were Delinquent at the close of business on the immediately preceding Determination Date. Any amounts held for future distribution and so used shall be replaced by the Servicer by deposit in the Custodial Account on or before any future Remittance Date if funds in the Custodial Account on such Remittance Date shall be less than remittances to the Master Servicer required to be made on such Remittance Date. The Servicer shall keep appropriate records of such amounts and will provide such records to the Master Servicer upon request. No provision in this Agreement shall be construed as limiting the Servicer’s right to (i) pass through late collections on the related Mortgage Loans in lieu of making Monthly Advances or (ii) reimburse itself for such Monthly Advances from late collections on the related Mortgage Loans.

The Servicer’s obligation to make such Monthly Advances as to any Mortgage Loan will continue through the last Monthly Payment due prior to the payment in full of the Mortgage Loan, or through the last Remittance Date prior to the Remittance Date for the distribution of all Liquidation Proceeds and other payments or recoveries (including Insurance Proceeds and Condemnation Proceeds) with respect to the related Mortgage Loan unless the Servicer deems such Monthly Advance to be non-recoverable, as evidenced by an Officer’s Certificate of the Servicer delivered to the Master Servicer.

ARTICLE V.

GENERAL SERVICING PROCEDURES

Section 5.01 Servicing Compensation; Seller Remittance Amount.

As consideration for servicing the Mortgage Loans subject to this Agreement, the Servicer shall retain (i) the Aurora Servicing Fee for each Mortgage Loan remaining subject to this Agreement during any month and (ii) Ancillary Income. In addition, if at any time the Servicer is the Retained Interest Holder with respect to any Mortgage Loans, then the Servicer, as the Retained Interest Holder, shall retain an amount equal to the Retained Interest relating to such Mortgage Loans; provided that (i) the Trustee and the Master Servicer shall have no obligation to make payment of the Retained Interest to the Servicer and (ii) the Servicer’s right to retain the Retained Interest is limited to (and the Retained Interest may only be retained from) the interest portion (including recoveries with respect to interest from Liquidation Proceeds) of the Monthly Payments collected by the Servicer with respect to those Mortgage Loans for which payment is in fact made of the entire amount of the Monthly Payment. The Aurora Servicing Fee shall be payable monthly. The Aurora Servicing Fees shall be payable only at the time of and with respect to those Mortgage Loans for which payment is in fact made of the entire amount of the Monthly Payment or as otherwise provided in Section 3.04. The obligation of the Trust Fund to pay the Aurora Servicing Fees is limited as provided in Section 3.04. The aggregate of the Aurora Servicing Fees payable to the Servicer for any month with respect to the Mortgage Loans shall be reduced by any Prepayment Interest Shortfall Amount with respect to such month. The Servicer shall be obligated to pay the aggregate Prepayment Interest Shortfall Amount for any month to the extent not covered by the aggregate Aurora Servicing Fees for such month up to a maximum of the aggregate General Servicing Fees for such month. The Servicer shall be entitled to recover any unpaid Aurora Servicing Fee and the Seller shall be entitled to recover the Seller Remittance Amount, to the extent not remitted, out of Insurance Proceeds, Condemnation Proceeds, REO Disposition Proceeds or Liquidation Proceeds to the extent permitted in Section 3.04 and out of amounts derived from the operation and sale of an REO Property to the extent permitted by Section 3.16. Any Prepayment Interest Excess Amount shall be retained by, or paid to, the Servicer as part of the Aurora Servicing Fee.

Additional servicing compensation in the form of Ancillary Income shall be retained by the Servicer only to the extent such fees or charges are received by the Servicer. The Servicer shall also be entitled pursuant to Section 3.04 and Section 3.06 to withdraw from the Custodial Account and Escrow Account, respectively, as additional servicing compensation, interest or other income earned on deposits therein, subject to Section 3.11.

The Servicer shall be required to pay all expenses incurred by it in connection with its servicing activities hereunder and shall not be entitled to reimbursement thereof except as specifically provided for herein.

Section 5.02 Report on Attestation of Compliance with Applicable Servicing Criteria.

The Servicer shall, on or before March 15^th of each calendar year, commencing in 2007, at its own expense, cause a firm of independent public accountants (who may also render other services to the Servicer), which is a member of the American Institute of Certified Public Accountants, to furnish to the Seller, the Trustee, the Depositor and the Master Servicer (i) year-end audited (if available) financial statements of the Servicer and (ii) a report to the effect that such firm attests to, and reports on, the assessment made by such asserting party pursuant to Section 5.04 below, which report shall be made in accordance with standards for attestation engagements issued or adopted by the Public Company Accounting Oversight Board. In addition, the Servicer shall, on or before March 15^th of each calendar year, commencing in 2007, at its own expense, furnish to the Seller, the Trustee, the Depositor and Master Servicer a report meeting the requirements of clause (ii) above regarding the attestation of any Participating Entity.

Section 5.03 Annual Officer’s Certificate.

(a) The Servicer shall, using its best reasonable efforts, on or before March 1^st, but in no event later than March 15^th, of each calendar year, commencing in 2007, at its own expense, deliver to the Seller, the Trustee, the Depositor and the Master Servicer with respect to the period ending on the immediately preceding December 31, a Servicing Officer’s certificate in the form of Exhibit L hereto, stating, as to each signer thereof, that (1) a review of the activities of the Servicer during such preceding calendar year or portion thereof and of its performance under this Agreement for such period has been made under such Servicing Officer’s supervision and (2) to the best of such officers’ knowledge, based on such review, the Servicer has fulfilled all of its obligations under this Agreement in all material respects throughout such year (or applicable portion thereof), or, if there has been a failure to fulfill any such obligation in any material respect, specifically identifying each such failure known to such Servicing Officer and the nature and status thereof, including the steps being taken by the Servicer to remedy such default.

(b) For so long as a certificate under the Xxxxxxxx-Xxxxx Act of 2002, as amended, ("Xxxxxxxx-Xxxxx") is required to be given on behalf of the Trust Fund, a Servicing Officer shall, using its best reasonable efforts, on or before March 1st, but in no event later than March 15th, (or if not a Business Day, the immediately preceding Business Day) of each calendar year , beginning in 2007, execute and deliver an Officer's Certificate to the Master Servicer, the Trustee and the Depositor for the benefit of the Trust Fund, the Master Servicer and the Depositor and their officers, directors and affiliates, in the form of Exhibit F hereto.

(c) The Servicer shall indemnify and hold harmless the Seller, the Trustee, the Master Servicer, the Depositor and their respective officers, directors, agents and affiliates from and against any losses, damages, penalties, fines, forfeitures, reasonable legal fees and related costs, judgments and other costs and expenses arising out of or based upon a breach by the Servicer or any of its officers, directors, agents or affiliates of its obligations under this Section 5.03 or the negligence, bad faith or willful misconduct of the Servicer in connection therewith. If the indemnification provided for herein is unavailable or insufficient to hold harmless the Master Servicer and/or the Depositor, then the Servicer agrees that it shall contribute to the amount paid or payable by the Master Servicer and/or the Depositor as a result of the losses, claims, damages or liabilities of the Master Servicer and/or the Depositor in such proportion as is appropriate to reflect the relative fault of the Master Servicer and/or the Depositor on the one hand and the Servicer on the other in connection with a breach of the Servicer’s obligations under this Section 5.03 or the Servicer’s negligence, bad faith or willful misconduct in connection therewith.

Section 5.04 Report on Assessment of Compliance with Applicable Servicing Criteria

The Servicer shall, using its best reasonable efforts, on or before March 1st, but in no event later than March 15th, of each calendar year, commencing in 2007, deliver to the Seller, the Trustee, the Master Servicer and the Depositor a report regarding its assessment of compliance with the servicing criteria identified in Exhibit J attached hereto, as of and for the immediately preceding calendar year. Such report shall address all of the servicing criteria specified in Exhibit J. Each such report shall include (a) a statement of the party’s responsibility for assessing compliance with the servicing criteria applicable to such party, (b) a statement that such party used the criteria identified in Item 1122(d) of Regulation AB (§ 229.1122(d)) to assess compliance with the applicable servicing criteria, (c) disclosure of any material instance of noncompliance identified by such party, and (d) a statement that a registered public accounting firm has issued an attestation report on such party’s assessment of compliance with the applicable servicing criteria, which report shall be delivered by the Servicer as provided in Section 5.02.

Section 5.05 Transfers of Mortgaged Property.

The Servicer shall use its best efforts to enforce any “due-on-sale” provision contained in any Mortgage or Mortgage Note and to deny assumption by the person to whom the Mortgaged Property has been or is about to be sold whether by absolute conveyance or by contract of sale, and whether or not the Mortgagor remains liable on the Mortgage and the Mortgage Note. When the Mortgaged Property has been conveyed by the Mortgagor, the Servicer shall, to the extent it has knowledge of such conveyance, exercise its rights to accelerate the maturity of such Mortgage Loan under the “due-on-sale” clause applicable thereto, provided, however, that the Servicer shall not exercise such rights if prohibited by law from doing so or if the exercise of such rights would impair or threaten to impair any recovery under the related PMI Policy or LPMI Policy, if any.

If the Servicer reasonably believes it is unable under applicable law to enforce such “due-on-sale” clause, the Servicer shall make all commercially reasonable efforts to enter into (i) an assumption and modification agreement with the person to whom such property has been conveyed, pursuant to which such person becomes liable under the Mortgage Note and the original Mortgagor remains liable thereon or (ii) in the event the Servicer is unable under applicable law to require that the original Mortgagor remain liable under the Mortgage Note and the Servicer has the prior consent of the primary mortgage guaranty insurer, a substitution of liability agreement with the owner of the Mortgaged Property pursuant to which the original Mortgagor is released from liability and the owner of the Mortgaged Property is substituted as Mortgagor and becomes liable under the Mortgage Note; provided that no such substitutions should be permitted unless such person satisfies the underwriting criteria of the Servicer and has a credit risk rating at least equal to that of the original Mortgagor. The Mortgage Loan, as assumed, shall conform in all respects to the requirements, representations and warranties of this Agreement. The Servicer shall notify the Master Servicer that any such assumption or substitution agreement has been contemplated by forwarding to the Master Servicer a copy of such assumption or substitution agreement (indicating the Mortgage File to which it relates). The Servicer shall forward an original copy of such agreement to the related Custodian to be held by such Custodian with the other documents related to such Mortgage Loan. The Servicer shall be responsible for recording any such assumption or substitution agreements. In connection with any such assumption or substitution agreement, the Monthly Payment on the related Mortgage Loan shall not be changed but shall remain as in effect immediately prior to the assumption or substitution, the Mortgage Interest Rate, the stated maturity or the outstanding principal amount of such Mortgage Loan shall not be changed nor shall any required monthly payments of principal or interest be deferred or forgiven. Any assumption fee collected by the Servicer for entering into an assumption agreement shall be retained by the Servicer as additional servicing compensation. In connection with any such assumption, none of the Mortgage Interest Rate borne by the related Mortgage Note, the term of the Mortgage Loan or the outstanding principal amount of the Mortgage Loan shall be changed.

ARTICLE VI.

REPRESENTATIONS, WARRANTIES

AND AGREEMENTS

Section 6.01 Representations, Warranties and Agreements of the Servicer.

The Servicer, as a condition to the consummation of the transactions contemplated hereby, hereby makes the following representations and warranties to the Seller, the Master Servicer, the Depositor and the Trustee as of the Closing Date:

(a) Due Organization and Authority. The Servicer is a limited liability company duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization and has all licenses necessary to carry on its business as now being conducted and is licensed, qualified and in good standing in each state where a Mortgaged Property is located if the laws of such state require licensing or qualification in order to conduct business of the type conducted by the Servicer, and in any event the Servicer is in compliance with the laws of any such state to the extent necessary to ensure the enforceability of the terms of this Agreement; the Servicer has the full power and authority to execute and deliver this Agreement and to perform in accordance herewith; the execution, delivery and performance of this Agreement (including all instruments of transfer to be delivered pursuant to this Agreement) by the Servicer and the consummation of the transactions contemplated hereby have been duly and validly authorized; this Agreement evidences the valid, binding and enforceable obligation of the Servicer and all requisite action has been taken by the Servicer to make this Agreement valid and binding upon the Servicer in accordance with its terms;

(b) Ordinary Course of Business. The consummation of the transactions contemplated by this Agreement are in the ordinary course of business of the Servicer;

(c) No Conflicts. None of the execution and delivery of this Agreement, the acquisition of the servicing responsibilities by the Servicer or the transactions contemplated hereby or the fulfillment of or compliance with the terms and conditions of this Agreement will conflict with or result in a breach of any of the terms, conditions or provisions of the Servicer’s organizational documents or any legal restriction or any agreement or instrument to which the Servicer is now a party or by which it is bound, or constitute a default or result in an acceleration under any of the foregoing, or result in the violation of any law, rule, regulation, order, judgment or decree to which the Servicer or its property is subject, or impair the ability of the Servicer to service the Mortgage Loans, or impair the value of the Mortgage Loans;

(d) Ability to Perform. The Servicer does not believe, nor does it have any reason or cause to believe, that it cannot perform each and every covenant contained in this Agreement;

(e) No Litigation Pending. There is no action, suit, proceeding or investigation pending (or, in the case of government authorities known to be contemplated) or threatened against the Servicer or any Subservicer which, either in any one instance or in the aggregate, may result in any material adverse change in the business, operations, financial condition, properties or assets of the Servicer or any Subservicer, or in any material impairment of the right or ability of the Servicer or any Subservicer to carry on its business substantially as now conducted, or in any material liability on the part of the Servicer or any Subservicer, or which would draw into question the validity of this Agreement or of any action taken or to be taken in connection with the obligations of the Servicer contemplated herein, or which would be likely to impair materially the ability of the Servicer to perform under the terms of this Agreement;

(f) No Consent Required. No consent, approval, authorization or order of any court or governmental agency or body is required for the execution, delivery and performance by the Servicer of or compliance by the Servicer with this Agreement;

(g) Ability to Service. The Servicer is an approved seller/servicer of conventional residential mortgage loans for Xxxxxx Xxx or Xxxxxxx Mac, with the facilities, procedures and experienced personnel necessary for the sound servicing of mortgage loans of the same type as the Mortgage Loans. The Servicer is in good standing to service mortgage loans for either Xxxxxx Mae or Xxxxxxx Mac. The Servicer is a member in good standing of the MERS system;

(h) No Untrue Information. Neither this Agreement nor any statement, report or other document furnished or to be furnished pursuant to this Agreement or in connection with the transactions contemplated hereby contains any untrue statement of fact or omits to state a fact necessary to make the statements contained therein not misleading;

(i) No Commissions to Third Parties. The Servicer has not dealt with any broker or agent or anyone else who might be entitled to a fee or commission in connection with this transaction other than the Seller;

(j) Fair Credit Reporting Act. The Servicer for each Mortgage Loan has fully furnished, in accordance with the Fair Credit Reporting Act and its implementing regulations, accurate and complete information (e.g., favorable and unfavorable) on its borrower credit files to Equifax, Experian and Trans Union Credit Information Company (three of the credit repositories), on a monthly basis; and

(k) Additional Representations and Warranties of the Servicer. Except as disclosed in writing to the Seller, the Master Servicer, the Depositor and the Trustee prior to the Closing Date: (i) the Servicer is not aware and has not received notice that any default, early amortization or other performance triggering event has occurred as to any other securitization due to any act or failure to act of the Servicer; (ii) the Servicer has not been terminated as servicer in a residential mortgage loan securitization, either due to a servicing default or to application of a servicing performance test or trigger; (iii) no material noncompliance with the applicable servicing criteria with respect to other securitizations of residential mortgage loans involving the Servicer as servicer has been disclosed or reported by the Servicer; (iv) no material changes to the Servicer’s policies or procedures with respect to the servicing function it will perform under this Agreement for mortgage loans of a type similar to the Mortgage Loans have occurred during the three-year period immediately preceding the Closing Date; (v) there are no aspects of the Servicer’s financial condition that could have a material adverse effect on the performance by the Servicer of its servicing obligations under this Agreement and (vi) there are no affiliations, relationships or transactions relating to the Servicer or any Subservicer with any party listed on Exhibit K hereto.

Section 6.02 Remedies for Breach of Representations and Warranties of the Servicer.

It is understood and agreed that the representations and warranties set forth in Section 6.01 shall survive the engagement of the Servicer to perform the servicing responsibilities as of the Closing Date or Servicing Transfer Date, as applicable, hereunder and the delivery of the Servicing Files to the Servicer and shall inure to the benefit of the Seller, the Master Servicer, the Depositor and the Trustee. Upon discovery by any of the Servicer, the Master Servicer, the Seller or the Depositor of a breach of any of the foregoing representations and warranties which materially and adversely affects the ability of the Servicer to perform its duties and obligations under this Agreement or otherwise materially and adversely affects the value of the Mortgage Loans, the Mortgaged Property or the priority of the security interest on such Mortgaged Property or the interest of the Seller or the Trustee, the party discovering such breach shall give prompt written notice to the other.

Within 60 days (or, in the case of any breach of a representation or warranty set forth in Section 6.01(k), 10 days) of the earlier of either discovery by or notice to the Servicer of any breach of a representation or warranty set forth in Section 6.01 which materially and adversely affects the ability of the Servicer to perform its duties and obligations under this Agreement or otherwise materially and adversely affects the value of the Mortgage Loans, the Mortgaged Property or the priority of the security interest on such Mortgaged Property, the Servicer shall use its Best Efforts promptly to cure such breach in all material respects and, if such breach cannot be cured, the Servicer shall, at the Trustee’s or the Master Servicer’s option, assign the Servicer’s rights and obligations under this Agreement (or respecting the affected Mortgage Loans) to a successor Servicer. Such assignment shall be made in accordance with Section 9.01.

In addition, the Servicer shall indemnify the Seller, the Master Servicer and the Trustee (and each of their respective directors, officers, employees and agents) and hold each of them harmless against any Costs resulting from any claim, demand, defense or assertion based on or grounded upon, or resulting from, a breach of the Servicer’s representations and warranties contained in this Agreement. It is understood and agreed that the remedies set forth in this Section 6.02 constitute the sole remedies of the Seller, the Master Servicer and the Trustee respecting a breach of the foregoing representations and warranties.

Any cause of action against the Servicer relating to or arising out of the breach of any representations and warranties made in Section 6.01 shall accrue upon (i) discovery of such breach by the Servicer or notice thereof by the Seller, the Master Servicer, the Depositor or the Trustee to the Servicer, (ii) failure by the Servicer to cure such breach within the applicable cure period, and (iii) demand upon the Servicer by the Seller, Master Servicer or the Depositor for compliance with this Agreement.

Section 6.03 Additional Indemnification by the Servicer; Third Party Claims.

The Servicer shall indemnify the Seller, the Depositor, the Trustee, the Master Servicer, the Trust Fund and each of their respective directors, officers, employees and agents and the Trust Fund and shall hold each of them harmless from and against any losses, damages, penalties, fines, forfeitures, legal fees and expenses and related costs, judgments, and any other costs, fees and expenses that any of them may sustain arising out of or based upon:

(A) any failure by the Servicer, any Subservicer or any Subcontractor to deliver any information, report, certification, accountants’ letter or other material when and as required under this Agreement, including any report under Sections 5.02, 5.03 or 5.04 or any failure by the Servicer to identify pursuant to Section 7.04(c) any Subcontractor that is a Participating Entity;

(B) the failure of the Servicer to perform its duties and service the Mortgage Loans in material compliance with the terms of this Agreement or

(C) the failure of the Servicer to cause any event to occur or not to occur which would have occurred or would not have occurred, as applicable, if the Servicer were applying Accepted Servicing Practices under this Agreement.

In the case of any failure of performance described in clause (A) of this Section 6.03, the Servicer shall promptly reimburse the Trustee, the Master Servicer or the Depositor, as applicable, and each Person responsible for the preparation, execution or filing of any report required to be filed with the Commission with respect to the transaction relating to this Agreement, or for execution of a certification pursuant to Rule 13a-14(d) or Rule 15d-14(d) under the Exchange Act with respect to this transaction, for all costs reasonably incurred by each such party in order to obtain the information, report, certification, accountants’ letter or other material not delivered as required by the Servicer, any Subservicer or any Subcontractor.

The Servicer shall immediately notify the Seller, the Depositor, the Master Servicer, the Trustee, the Trust Fund or any other relevant party if a claim is made by a third party with respect to this Agreement or the Mortgage Loans, assume (with the prior written consent of the indemnified party in the event of an indemnified claim) the defense of any such claim and pay all expenses in connection therewith, including counsel fees, promptly pay, discharge and satisfy any judgment or decree which may be entered against it or any other party in respect of such claim and follow any written instructions received from such indemnified party in connection with such claim. Subject to the Servicer’s indemnification pursuant to Section 6.02, or the failure of the Servicer to service and administer the Mortgage Loans in material compliance with the terms of this Agreement, the Trust Fund shall indemnify the Servicer and hold the Servicer harmless against any and all Costs that the Servicer may sustain in connection with any legal action relating to this Agreement, the Certificates or the origination or Servicing of the Mortgage Loans by any prior owner or servicer, other than any Costs incurred by reason of the Servicer’s willful misfeasance, bad faith or negligence in the performance of duties hereunder or by reason of its reckless disregard of obligations and duties hereunder.

Section 6.04 Indemnification with Respect to Certain Taxes and Loss of REMIC Status.

In the event that any REMIC fails to qualify as a REMIC, loses its status as a REMIC, or incurs federal, state or local taxes as a result of a prohibited transaction or prohibited contribution under the REMIC Provisions due to the negligent performance by the Servicer of its duties and obligations set forth herein, the Servicer shall indemnify the Holder of the related Residual Certificate, the Master Servicer, the Trustee and the Trust Fund (and each of their respective directors, officers, employees and agents) against any and all losses, claims, damages, liabilities or expenses (“Losses”) resulting from such negligence; provided, however, that the Servicer shall not be liable for any such Losses attributable to the action or inaction of the Trustee, the Depositor or the Holder of such Residual Certificate, as applicable, nor for any such Losses resulting from misinformation provided by the Holder of such Residual Certificate on which the Servicer has relied. The foregoing shall not be deemed to limit or restrict the rights and remedies of the Holder of such Residual Certificate, the Master Servicer, the Trustee or the Trust Fund now or hereafter existing at law or in equity or otherwise. Notwithstanding the foregoing, however, in no event shall the Servicer have any liability (1) for any action or omission that is taken in accordance with and in compliance with the express terms of, or which is expressly permitted by the terms of, this Agreement, (2) for any Losses other than arising out of a negligent performance by the Servicer of its duties and obligations set forth herein, and (3) for any special or consequential damages to Certificateholders (in addition to payment of principal and interest on the Certificates).

Section 6.05 Reporting Requirements of the Commission and Indemnification.

Notwithstanding any other provision of this Agreement, the Servicer acknowledges and agrees that the purpose of Sections 4.02(c) and (d), 5.02, 5.03, 5.04, 6.01(k), 6.03 and 7.04 of this Agreement is to facilitate compliance by the Trustee, the Master Servicer and the Depositor with the provisions of Regulation AB. Therefore, the Servicer agrees that (a) the obligations of the Servicer hereunder shall be interpreted in such a manner as to accomplish that purpose, (b) such obligations may change over time due to interpretive advice or guidance of the Commission, convention or consensus among active participants in the asset-backed securities markets, advice of counsel, or otherwise in respect of the requirements of Regulation AB, (c) the Servicer shall agree to enter into such amendments to this Agreement as may be necessary, in the judgment of the Depositor, the Master Servicer and their respective counsel, to comply with such interpretive advice or guidance, convention, consensus, advice of counsel, or otherwise, (d) the Servicer shall otherwise comply with requests made by the Trustee, the Master Servicer or the Depositor for delivery of additional or different information as such parties may determine in good faith is necessary to comply with the provisions of Regulation AB and (e) the Servicer shall (i) agree to such modifications and enter into such amendments to this Agreement as may be necessary, in the judgment of the Depositor, the Master Servicer and their respective counsel, to comply with any such clarification, interpretive guidance, convention or consensus and (ii) promptly upon request provide to the Depositor for inclusion in any periodic report required to be filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), such items of information regarding this Agreement and matters related to the Servicer, (collectively, the “Servicer Information”), provided that such information shall be required to be provided by the Servicer only to the extent that such shall be determined by the Depositor in its sole discretion and its counsel to be necessary or advisable to comply with any Commission and industry guidance and convention.

Notwithstanding the foregoing paragraph, any modifications or amendments of the obligations of the Servicer under this agreement made pursuant to this Section 6.05 shall be made in writing and upon mutual agreement with the Servicer (provided that such agreement shall not be unreasonably withheld).

The Servicer hereby agrees to indemnify and hold harmless the Depositor, the Trustee, the Master Servicer, their respective officers and directors and each person, if any, who controls the Depositor or Master Servicer within the meaning of Section 15 of the Securities Act of 1933, as amended (the “Act”), or Section 20 of the Exchange Act, from and against any and all losses, claims, expenses, damages or liabilities to which the Depositor, the Trustee, the Master Servicer, their respective officers or directors and any such controlling person may become subject under the Act or otherwise, as and when such losses, claims, expenses, damages or liabilities are incurred, insofar as such losses, claims, expenses, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in the Servicer Information or arise out of, or are based upon, the omission or alleged omission to state therein any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading, and will reimburse the Depositor, the Trustee, the Master Servicer, their respective officers and directors and any such controlling person for any legal or other expenses reasonably incurred by it or any of them in connection with investigating or defending any such loss, claim, expense, damage, liability or action, as and when incurred; provided, however, that the Servicer shall be liable only insofar as such untrue statement or alleged untrue statement or omission or alleged omission relates solely to the information in the Servicer Information furnished to the Depositor, the Trustee or Master Servicer by or on behalf of the Servicer specifically in connection with this Agreement.

ARTICLE VII.

THE SERVICER

Section 7.01 Merger or Consolidation of the Servicer.

The Servicer shall keep in full effect its existence, rights and franchises as a limited liability company, and shall obtain and preserve its qualification to do business as a foreign entity in each jurisdiction in which such qualification is or shall be necessary to protect the validity and enforceability of this Agreement or any of the Mortgage Loans and to perform its duties under this Agreement.

Any Person into which the Servicer may be merged or consolidated, or any corporation (or limited liability company) resulting from any merger, conversion or consolidation to which the Servicer shall be a party, or any Person succeeding to the business of the Servicer, shall, with the prior written consent of the Master Servicer, be the successor of the Servicer hereunder, without the execution or filing of any paper or any further act on the part of any of the parties hereto, anything herein to the contrary notwithstanding, provided, however, that the successor or surviving Person shall be an institution (i) having a net worth of not less than $25,000,000, and (ii) which is a Xxxxxx Mae or Xxxxxxx Mac-approved servicer in good standing.

Section 7.02 Limitation on Liability of the Servicer and Others.

Neither the Servicer nor any of the directors, officers, employees or agents of the Servicer shall be under any liability to the Seller, the Master Servicer, the Depositor or the Trustee for any action taken or for refraining from the taking of any action in good faith pursuant to this Agreement, or for errors in judgment; provided, however, that this provision shall not protect the Servicer or any such person against any breach of warranties or representations made herein, or failure to perform its obligations in strict compliance with any standard of care set forth in this Agreement, or any liability which would otherwise be imposed by reason of any breach of the terms and conditions of this Agreement. The Servicer and any director, officer, employee or agent of the Servicer may rely in good faith on any document of any kind prima facie properly executed and submitted by any Person respecting any matters arising hereunder. The Servicer shall not be under any obligation to appear in, prosecute or defend any legal action which is not incidental to its duties to service the Mortgage Loans in accordance with this Agreement and which in its opinion may involve it in any expense or liability, provided, however, that the Servicer may, with the consent of the Master Servicer, undertake any such action which it may deem necessary or desirable in respect of this Agreement and the rights and duties of the parties hereto. In such event, the Servicer shall be entitled to reimbursement from the Trust Fund for the reasonable legal expenses and costs of such action.

Section 7.03 Limitation on Resignation and Assignment by the Servicer.

The Seller has entered into this Agreement with the Servicer in reliance upon the independent status of the Servicer, and the representations as to the adequacy of its servicing facilities, plant, personnel, records and procedures, its integrity, reputation and financial standing, and the continuance thereof. Therefore, the Servicer shall neither assign its rights under this Agreement or the servicing hereunder nor delegate its duties hereunder or any portion thereof, or sell or otherwise dispose of all or substantially all of its property or assets without, in each case, the prior written consent of the Seller and the Master Servicer which consent, in the case of an assignment of rights or delegation of duties, shall be granted or withheld in the discretion of the Seller and the Master Servicer and which consent, in the case of a sale or disposition of all or substantially all of the property or assets of the Servicer, shall not be unreasonably withheld by any of them; provided that in each case, there must be delivered to the Seller, the Master Servicer and the Trustee a letter from each Rating Agency to the effect that such transfer of servicing or sale or disposition of assets will not result in a qualification, withdrawal or downgrade of the then-current rating of any of the Certificates. Notwithstanding the foregoing, the Servicer, without the consent of the Seller, the Master Servicer or the Trustee, may retain third party contractors to perform certain servicing and loan administration functions, including without limitation, hazard insurance administration, tax payment and administration, flood certification and administration, collection services and similar functions; provided that the retention of such contractors by Servicer shall not limit the obligation of the Servicer to service the Mortgage Loans pursuant to the terms and conditions of this Agreement.

The Servicer shall not resign from the obligations and duties hereby imposed on it except by mutual consent of the Servicer and the Master Servicer or upon the determination that its duties hereunder are no longer permissible under applicable law and such incapacity cannot be cured by the Servicer. Any such determination permitting the resignation of the Servicer shall be evidenced by an Opinion of Counsel to such effect delivered to the Seller, the Master Servicer and the Trustee, which Opinion of Counsel shall be in form and substance acceptable to each of them. No such resignation shall become effective until a successor shall have assumed the Servicer’s responsibilities and obligations hereunder in the manner provided in Section 9.01.

Without in any way limiting the generality of this Section 7.03, in the event that the Servicer either shall assign this Agreement or the servicing responsibilities hereunder or delegate its duties hereunder or any portion thereof or sell or otherwise dispose of all or substantially all of its property or assets, without the prior written consent of the Seller and the Master Servicer, then such parties shall have the right to terminate this Agreement upon notice given as set forth in Section 8.01, without any payment of any penalty or damages and without any liability whatsoever to the Servicer or any third party.

Section 7.04 Subservicing Agreements and Successor Subservicer.

(a) The Servicer shall not hire or otherwise utilize the services of any Subservicer to fulfill any of the obligations of the Servicer as servicer under this Agreement unless the Servicer complies with the provisions of paragraph (b) of this Section 7.04 and the proposed Subservicer (i) is an institution which is an approved Xxxxxx Xxx or Xxxxxxx Mac Seller/Servicer as indicated in writing and (ii) represents and warrants that it is in compliance with the laws of each state as necessary to enable it to perform its obligations under such subservicing agreement. The Servicer shall not hire or otherwise utilize the services of any Subcontractor, and shall not permit any Subservicer to hire or otherwise utilize the services of any Subcontractor, to fulfill any of the obligations of the Servicer as servicer under this Agreement unless the Servicer complies with the provisions of paragraph (c) of this Section 7.04.

(b) The Servicer shall give prior written notice to the Trustee, the Master Servicer and the Depositor of the appointment of any Subservicer and shall furnish to the Trustee, Master Servicer and the Depositor a copy of any related subservicing agreement. For purposes of this Agreement, the Servicer shall be deemed to have received payments on Mortgage Loans immediately upon receipt by any Subservicer of such payments. Any such subservicing agreement shall be consistent with and not violate the provisions of this Agreement. Each subservicing agreement shall provide that a successor Servicer shall have the option to terminate such agreement without payment of any fees if the predecessor Servicer is terminated or resigns. The Servicer shall cause any Subservicer used by the Servicer (or by any Subservicer) to comply with the provisions of this Section 7.04 and with Sections 4.02(c), 5.02, 5.03(a), 5.03(b), 5.04, 6.01(k) and 6.03 and Exhibit J of this Agreement to the same extent as if such Subservicer were the Servicer. The Servicer shall be responsible for obtaining from each Subservicer and delivering to the Trustee, the Master Servicer and the Depositor any servicer compliance statement required to be delivered by such Subservicer under Section 5.03(a), any reports on assessment of compliance and attestation required to be delivered by such Subservicer under Sections 5.02 and 5.04 and any certification required to be delivered under 5.03(b) to the Person that will be responsible for signing the Sarbanes Certification under Section 5.04 as and when required to be delivered hereunder.

(c) The Servicer shall give prior written notice to the Master Servicer and the Depositor of the appointment of any Subcontractor and a written description (in form and substance satisfactory to the Master Servicer and the Depositor) of the role and function of each Subcontractor utilized by the Servicer or any Subservicer, specifying (A) the identity of each such Subcontractor, (B) which (if any) of such Subcontractors are Participating Entities, and (C) which elements of the servicing criteria set forth under Item 1122(d) of Regulation AB will be addressed in assessments of compliance provided by each Subcontractor identified pursuant to clause (B) of this paragraph.

As a condition to the utilization of any Subcontractor determined to be a Participating Entity, the Servicer shall cause any such Subcontractor used by the Servicer (or by any Subservicer) for the benefit of the Trustee, the Master Servicer and the Depositor to comply with the provisions of Sections 4.02(c), 5.02, 5.04, 6.01(k) and 6.03 and Exhibit J of this Agreement to the same extent as if such Subcontractor were the Servicer. The Servicer shall be responsible for obtaining from each Subcontractor and delivering to the Trustee, the Master Servicer and the Depositor any assessment of compliance and attestation required to be delivered by such Subcontractor under Sections 5.02 and 5.04, in each case as and when required to be delivered.

The Servicer acknowledges that a Subcontractor that performs services with respect to mortgage loans involved in this transaction in addition to the Mortgage Loans may be determined by the Depositor to be a Participating Entity on the basis of the aggregate balance of such mortgage loans, without regard to whether such Subcontractor would be a Participating Entity with respect to the Mortgage Loans viewed in isolation. The Servicer shall (A) respond as promptly as practicable to any good faith request by the Trustee, the Master Servicer or the Depositor for information regarding each Subcontractor and (B) cause each Subcontractor with respect to which the Trustee, the Master Servicer or the Depositor requests delivery of an assessment of compliance and accountants’ attestation to deliver such within the time required under Section 5.04.

(d) Notwithstanding any subservicing agreement or the provisions of this Agreement relating to agreements or arrangements between the Servicer and a Subservicer, Subcontractor or other third party or reference to actions taken through a Subservicer, a Subcontractor, another third party or otherwise, the Servicer shall remain obligated and primarily liable to the Trust Fund, the Trustee, the Master Servicer and the Certificateholders for the servicing and administering of the Mortgage Loans in accordance with the provisions hereof without diminution of such obligation or liability by virtue of any subservicing, subcontracting or other agreements or arrangements or by virtue of indemnification from a Subservicer, Subcontractor or a third party and to the same extent and under the same terms and conditions as if the Servicer alone were servicing the Mortgage Loans, including with respect to compliance with Item 1122 of Regulation AB. The Servicer shall be entitled to enter into any agreement with a Subservicer, Subcontractor or a third party for indemnification of the Servicer by such Subservicer, Subcontractor or third party and nothing contained in the Agreement shall be deemed to limit or modify such indemnification.

Section 7.05 Inspection.

The Servicer shall offer the Master Servicer, upon reasonable advance notice, during normal business hours, access to all records maintained by the Servicer in respect of its rights and obligations hereunder and access to officers of the Servicer responsible for such obligations. Upon request, the Servicer shall furnish to the Master Servicer its most recent publicly available financial statements and such other information relating to its capacity to perform its obligations under this Agreement.

ARTICLE VIII.

TERMINATION

Section 8.01 Termination for Cause.

This Agreement shall be terminable at the option of the Seller or the Master Servicer if any of the following events of default exist on the part of the Servicer:

(i) any failure by the Servicer to remit to the Master Servicer any payment required to be made under the terms of this Agreement which continues unremedied for a period of two Business Days after the date upon which written notice of such failure, requiring the same to be remedied, shall have been given to the Servicer by the Master Servicer; or

(ii) any failure by the Servicer to duly perform, within the required time period and without notice, its obligations to provide any certifications required pursuant to Sections 5.02, 5.03 or 5.04 (including with respect to such certifications required to be provided by any Subservicer or Subcontractor pursuant to Section 7.04), which failure continues unremedied for a period of ten (10) days from the date of delivery required with respect to such certification; or

(iii) except with respect to those items listed in clause (ii) above, any failure by the Servicer to duly perform, within the required time period, without notice or grace period, its obligations to provide the information, data and materials required to be provided hereunder pursuant to Sections 4.02(c), 4.02(d), 6.01(k) and 7.04, including any items required to be included in any Exchange Act report; or

(iv) failure by the Servicer duly to observe or perform in any material respect any other of the covenants or agreements on the part of the Servicer set forth in this Agreement which continues unremedied for a period of 30 days; or

(v) failure by the Servicer to maintain its license to do business or service residential mortgage loans in any jurisdiction, if required by such jurisdiction, where the Mortgaged Properties are located; or

(vi) a decree or order of a court or agency or supervisory authority having jurisdiction for the appointment of a conservator or receiver or liquidator in any insolvency, readjustment of debt, including bankruptcy, marshaling of assets and liabilities or similar proceedings, or for the winding-up or liquidation of its affairs, shall have been entered against the Servicer and such decree or order shall have remained in force undischarged or unstayed for a period of 60 days; or

(vii) the Servicer shall consent to the appointment of a conservator or receiver or liquidator in any insolvency, readjustment of debt, marshaling of assets and liabilities or similar proceedings of or relating to the Servicer or of or relating to all or substantially all of its property; or

(viii) the Servicer shall admit in writing its inability to pay its debts generally as they become due, file a petition to take advantage of any applicable insolvency, bankruptcy or reorganization statute, make an assignment for the benefit of its creditors, voluntarily suspend payment of its obligations or cease its normal business operations for three Business Days; or

(ix) the Servicer ceases to meet the qualifications of a Xxxxxx Xxx or Xxxxxxx Mac seller/servicer; or

(x) the Servicer attempts to assign the servicing of the Mortgage Loans or its right to servicing compensation hereunder or the Servicer attempts to sell or otherwise dispose of all or substantially all of its property or assets or to assign this Agreement or the servicing responsibilities hereunder or to delegate its duties hereunder or any portion thereof, in each case without complying fully with the provisions of Section 7.03; or

(xi) the Servicer’s residential primary servicer rating for servicing of subprime mortgage loan issued by any of the Rating Agencies is reduced below its rating in effect on the Closing Date or such rating is withdrawn; provided, however, that if the Servicer’s rating by any Rating Agency is reduced by not more than one level (e.g., from “strong” to “above average”) the Servicer shall have 180 days to cure such default by having the applicable Rating Agency restore the Servicer’s rating to its level in effect on the Closing Date.

In each and every such case, so long as an event of default shall not have been remedied within the applicable cure period, in addition to whatever rights the Seller, the Master Servicer or the Trustee may have at law or equity to damages, including injunctive relief and specific performance, the Seller, the Master Servicer or the Trustee, by notice in writing to the Servicer, may terminate all the rights and obligations of the Servicer under this Agreement and in and to the servicing contract established hereby and the proceeds thereof.

Upon receipt by the Servicer of such written notice, all authority and power of the Servicer under this Agreement, whether with respect to the Mortgage Loans or otherwise, shall pass to and be vested in a successor Servicer appointed by the Master Servicer. Upon written request from the Master Servicer, the Servicer shall prepare, execute and deliver to the successor entity designated by the Master Servicer any and all documents and other instruments, place in such successor’s possession all Servicing Files, and do or cause to be done all other acts or things necessary or appropriate to effect the purposes of such notice of termination, including but not limited to the transfer and endorsement or assignment of the Mortgage Loans and related documents, at the Servicer’s sole expense. The Servicer shall cooperate with the Seller, the Master Servicer, the Trustee and such successor servicer in effecting the termination of the Servicer’s responsibilities and rights hereunder, including without limitation, the transfer to such successor for administration by it of all cash amounts which shall at the time be credited by the Servicer to the Custodial Account or Escrow Account or thereafter received with respect to the Mortgage Loans.

By a written notice, either the Seller or the Master Servicer, with the consent of the other party, may waive any default by the Servicer in the performance of its obligations hereunder and its consequences. Upon any waiver of a past default, such default shall cease to exist, and any Event of Default arising therefrom shall be deemed to have been remedied for every purpose of this Agreement. No such waiver shall extend to any subsequent or other default or impair any right consequent thereon except to the extent expressly so waived.

Upon a termination for cause pursuant to Section 8.01, all unreimbursed Aurora Servicing Fees, Servicing Advances and Monthly Advances still owing the Servicer shall be paid by the Trust Fund as such amounts are received from the related Mortgage Loans.

Section 8.02 Termination Without Cause.

(a) This Agreement shall terminate upon: (i) the later of (a) the distribution of the final payment or liquidation proceeds on the last Mortgage Loan to the Master Servicer (or advances by the Servicer for the same), and (b) the disposition of all REO Property acquired upon foreclosure of the last Mortgage Loan and the remittance of all funds due hereunder, (ii) mutual consent of the Servicer, the Seller and the Master Servicer in writing provided such termination is also acceptable to the Rating Agencies or (iii) with the prior written consent of the Master Servicer at the discretion of the Seller. Any such termination pursuant to clause (iii) above shall be with 30 days’ prior notice, in writing and delivered to the Master Servicer, the Trustee and the Servicer by registered mail to the addresses set forth in Section 9.03 of this Agreement. The Servicer shall comply with the termination procedures set forth in Sections 7.03, 8.01 and 9.01 hereof. The Master Servicer shall have no right to terminate the Servicer pursuant to clause (iii) of this Section 8.02(a). In connection with a termination by the Seller pursuant to clause (iii) of this Section 8.02(a), the Servicer shall be reimbursed by the Seller for all unreimbursed out-of-pocket Servicing Advances, Monthly Advances and Aurora Servicing Fees and other reasonable and necessary out-of-pocket costs associated with any transfer of servicing at the time of such transfer of servicing. All invoices received by the Servicer after termination will be forwarded to the Seller or the successor servicer for payment within thirty (30) days of receipt from the Servicer.

(b) In the event that the Servicer decides to terminate its obligations under this Agreement as set forth in clause (ii) of Section 8.02(a), the Servicer agrees that it will continue to service the Mortgage Loans beyond the prescribed termination date until such time as the Master Servicer, using reasonable commercial efforts, is able to appoint a successor servicer meeting the characteristics of Sections 7.01 and 9.01.

Section 8.03 Termination for Released Mortgage Loans.

(a) This Agreement shall be terminated with respect to the servicing of those Mortgage Loans that are determined to be Released Mortgage Loans as of the Transfer Date and servicing of such Mortgage Loans shall be transferred to the Released Mortgage Transferee or its designee.

(b) All reasonable costs and expenses incurred in connection with the delivery of the Servicing Files and the other necessary data to the Released Mortgage Transferee or its designee shall be paid by the Released Mortgage Transferee from its own funds without reimbursement therefor within fifteen (15) Business Days upon receipt of an invoice from the Servicer. The Released Mortgage Transferee shall be responsible for the delivery of all required transfer notices pursuant to the Trust Agreement and will send a copy of the transfer notices to the Master Servicer and the Trustee.

ARTICLE IX.

MISCELLANEOUS PROVISIONS

Section 9.01 Successor to the Servicer.

Simultaneously with the termination of the Servicer’s responsibilities and duties under this Agreement (a) pursuant to Sections 6.02, 7.03, 8.01 or 8.02(a)(ii), the Master Servicer shall (i) within 90 days of the Servicer’s notice of such termination, succeed to and assume all of the Servicer’s responsibilities, rights, duties and obligations under this Agreement, or (ii) appoint a successor having the characteristics set forth in clauses (i) and (ii) of Section 7.01 and which shall succeed to all rights and assume all of the responsibilities, duties and liabilities of the Servicer under this Agreement simultaneously with the termination of the Servicer’s responsibilities, duties and liabilities under this Agreement; or (b) pursuant to a termination under Section 8.02(a)(iii), the Seller shall appoint a successor having the characteristics set forth in clauses (i) and (ii) of Section 7.01 and which shall succeed to all rights and assume all of the responsibilities, duties and liabilities of the Servicer under this Agreement simultaneously with the termination of the Servicer’s responsibilities, duties and liabilities under this Agreement. Any successor to the Servicer shall be subject to the approval of the Master Servicer shall be a member in good standing of the MERS system (if any of the Mortgage Loans are MERS Eligible Mortgage Loans, unless such Mortgage Loans are withdrawn from MERS and Assignments of Mortgage are recorded in favor of the Trustee at the expense of the successor Servicer). Any approval of a successor servicer by the Master Servicer shall, if the successor servicer is not at that time a servicer of other Mortgage Loans for the Trust Fund, be conditioned upon the receipt by the Master Servicer, the Seller and the Trustee of a letter from each Rating Agency to the effect that such transfer of servicing will not result in a qualification, withdrawal or downgrade of the then-current rating of any of the Certificates. In connection with such appointment and assumption, the Master Servicer or the Seller, as applicable, may make such arrangements for the compensation of such successor out of payments on Mortgage Loans as it and such successor shall agree, provided, however, that no such compensation shall be in excess of the General Servicing Fee permitted the Servicer under this Agreement. In the event that the Servicer’s duties, responsibilities and liabilities under this Agreement should be terminated pursuant to the aforementioned sections, the Servicer shall discharge such duties and responsibilities during the period from the date it acquires knowledge of such termination until the effective date thereof with the same degree of diligence and prudence which it is obligated to exercise under this Agreement, and shall take no action whatsoever that might impair or prejudice the rights or financial condition of its successor. The resignation or removal of the Servicer pursuant to the aforementioned sections shall not become effective until a successor shall be appointed pursuant to this Section 9.01 and shall in no event relieve the Servicer of the representations and warranties made pursuant to Sections 6.01 and the remedies available to the Master Servicer, the Trustee and the Seller under Sections 6.02, 6.03 and 6.04, it being understood and agreed that the provisions of such Sections 6.01, 6.02, 6.03 and 6.04 shall be applicable to the Servicer notwithstanding any such resignation or termination of the Servicer, or the termination of this Agreement. Neither the Master Servicer, in its capacity as successor servicer, nor any other successor servicer shall be responsible for the lack of information and/or documents that it cannot otherwise obtain through reasonable efforts.

Within a reasonable period of time, but in no event longer than 30 days of the appointment of a successor entity, the Servicer shall prepare, execute and deliver to the successor entity any and all documents and other instruments, place in such successor’s possession all Servicing Files, and do or cause to be done all other acts or things necessary or appropriate to effect the purposes of such notice of termination, including but not limited to the transfer and endorsement of the Mortgage Notes and related documents, and the preparation and recordation of Assignments of Mortgage. The Servicer shall cooperate with the Trustee, the Master Servicer or the Seller, as applicable, and such successor in effecting the termination of the Servicer’s responsibilities and rights hereunder and the transfer of servicing responsibilities to the successor Servicer, including without limitation, the transfer to such successor for administration by it of all cash amounts which shall at the time be credited by the Servicer to the Custodial Account or Escrow Account or thereafter received with respect to the Mortgage Loans. Notwithstanding anything to the contrary set forth herein, the Servicer shall not be prohibited from retaining copies of the Mortgage Loan documents, Servicing Files and other records related to the Mortgage Loans as the Servicer reasonably deems necessary.

Any successor appointed as provided herein shall execute, acknowledge and deliver to the Trustee, the Servicer, the Master Servicer and the Seller an instrument (i) accepting such appointment, wherein the successor shall make the representations and warranties set forth in Section 6.01 (including a representation that the successor servicer is a member of MERS, unless none of the Mortgage Loans are MERS Mortgage Loans or MERS Eligible Mortgage Loans or any such Mortgage Loans have been withdrawn from MERS and Assignments of Mortgage are recorded in favor of the Trustee) and provide for the same remedies set forth in Sections 6.02, 6.03 and 6.04 herein and (ii) an assumption of the due and punctual performance and observance of each covenant and condition to be performed and observed by the Servicer under this Agreement, whereupon such successor shall become fully vested with all the rights, powers, duties, responsibilities, obligations and liabilities of the Servicer, with like effect as if originally named as a party to this Agreement. Any termination or resignation of the Servicer or termination of this Agreement pursuant to Sections 6.02, 7.03, 8.01 or 8.02 shall not affect any claims that the Seller, the Master Servicer or the Trustee may have against the Servicer arising out of the Servicer’s actions or failure to act prior to any such termination or resignation. In addition, in the event any successor servicer is appointed pursuant to Section 8.02(a)(iii) of this Agreement, such successor servicer must satisfy the conditions relating to the transfer of servicing set forth in the Trust Agreement.

The Servicer shall deliver promptly to the successor servicer the funds in the Custodial Account and Escrow Account and all Mortgage Loan documents and related documents and statements held by it hereunder and the Servicer shall account for all funds and shall execute and deliver such instruments and do such other things as may reasonably be required to more fully and definitively vest in the successor all such rights, powers, duties, responsibilities, obligations and liabilities of the Servicer.

Upon a successor’s acceptance of appointment as such, the Servicer shall notify the Trustee, the Seller, the Master Servicer and the Depositor of such appointment in accordance with the procedures set forth in Section 9.03.

Section 9.02 Costs.

The Seller shall pay the legal fees and expenses of its attorneys. Costs and expenses incurred in connection with the transfer of the servicing responsibilities, including fees for delivering Servicing Files, shall be paid by the Seller. Subject to Sections 2.02 and 3.01(a), the Seller, on behalf of the Depositor, shall pay the costs associated with the preparation, delivery and recording of Assignments of Mortgages.

Section 9.03 Notices.

All demands, notices and communications hereunder shall be in writing and shall be deemed to have been duly given if sent by facsimile or mailed by overnight courier, addressed as follows (or such other address as may hereafter be furnished to the other party by like notice):

(i) if to LBH:

Xxxxxx Brothers Holdings Inc.

000 Xxxxxxx Xxxxxx, 0^xx Xxxxx

Xxx Xxxx, Xxx Xxxx 00000

Attention: Manager, Contract Finance (SASCO 2006-S4)

Telephone: (000) 000-0000

Facsimile: (000) 000-0000

(ii) if to the Servicer:

Aurora Loan Services LLC

00000 Xxxx Xxxxxxx Xxxxx

Xxxxxxxxx, Xxxxxxxx 00000

Attention: Xxx Xxxxxx (SASCO 2006-S4)

Telephone: (000) 000-0000

Facsimile: (000) 000-0000

with a copy to:

Aurora Loan Services LLC

000 Xxxxx Xxxxxx

X.X. Xxx 0000

Xxxxxxxxxxx, Xxxxxxxx 00000

Attention: Manager, Loan Administration, SASCO 2006-S4

Telephone: (000) 000-0000

Facsimile: (000) 000-0000

(iii) if to the Master Servicer:

Aurora Loan Services LLC

00000 Xxxx Xxxxxxx Xxxxx

Xxxxxxxxx, Xxxxxxxx 00000

Attention: Xxxxxx X. Xxxxxx

Telephone: (000) 000-0000

Facsimile: (000) 000-0000

(iv) if to the Trust Fund or the Trustee:

Citibank, N.A.

000 Xxxxxxxxx Xxxxxx, 00xx Xxxxx

Xxx Xxxx, Xxx Xxxx 00000

Attention: Agency & Trust, SASCO 2006-S4

(v) if to the Credit Risk Manager:

Xxxxxxx Fixed Income Services Inc.

0000 Xxxxxxx Xxxxxx, Xxxxx 0000

Xxxxxx, Xxxxxxxx 00000

Attention: General Counsel

Telephone: (000) 000-0000

Facsimile: (000) 000-0000

Any such demand, notice or communication hereunder shall be deemed to have been received on the date delivered to or received at the premises of the addressee. Notwithstanding anything to the contrary in this Agreement, the Servicer shall not be obligated to provide notices pursuant to this Agreement to any party whose address is not provided in this Section 9.03 until 30 days after the Servicer has received notice of the appointment of such party (including the name, address, telephone number and facsimile number of such party).

Section 9.04 Severability Clause.

Any part, provision, representation or warranty of this Agreement which is prohibited or which is held to be void or unenforceable shall be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof. Any part, provision, representation or warranty of this Agreement which is prohibited or unenforceable or is held to be void or unenforceable in any jurisdiction shall be ineffective, as to such jurisdiction, to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any jurisdiction as to any Mortgage Loan shall not invalidate or render unenforceable such provision in any other jurisdiction. To the extent permitted by applicable law, the parties hereto waive any provision of law which prohibits or renders void or unenforceable any provision hereof. If the invalidity of any part, provision, representation or warranty of this Agreement shall deprive any party of the economic benefit intended to be conferred by this Agreement, the parties shall negotiate, in good-faith, to develop a structure the economic effect of which is as close as possible to the economic effect of this Agreement without regard to such invalidity.

Section 9.05 No Personal Solicitation.

From and after the Closing Date, the Servicer hereby agrees that it will not take any action or permit or cause any action to be taken by any of its agents or affiliates, or by any independent contractors on the Servicer’s behalf, to personally, by telephone or mail, solicit the borrower or obligor under any Mortgage Loan (on a targeted basis) for any purposes of prepayment, refinancing or modification of the related Mortgage Loan, provided, however, that this limitation shall not prohibit the Servicer from soliciting such Mortgagor for purposes of prepayment, refinance or modification of any loan owned or serviced by the Servicer other than a Mortgage Loan. Notwithstanding the foregoing, it is understood and agreed that, among other marketing activities, promotions and solicitations (including, without limitation, those for purposes of prepayment, refinance or modification) undertaken by the Servicer which are directed to the general public at large or which are directed generally to a segment of the then existing customers of the Servicer or any of its affiliates (including, without limitation, the mailing of promotional materials to the Servicer’s or its affiliates’ deposit customers by inserting such materials into customer account statements, mass mailings based on commercially acquired mailing lists and newspaper, radio and television advertisements and solicitations made on the basis of information acquired by the Servicer or its affiliates that indicates that a borrower may be planning to refinance) shall not constitute solicitation under this section. Language included on or in the Servicer’s website, interactive voice response system, coupon books or billing statements that is not specifically targeted at the borrower or obligor under any Mortgage Loan, shall not be deemed to constitute solicitations under Section 9.05. In the event the Servicer does refinance any Mortgage Loan as a result of a violation of the requirements set forth in this Section 9.05, the Servicer hereby agrees to pay to the Trust Fund an amount equal to the difference, if any, between the amount that the Trust Fund would have received if it had sold the Mortgage Loan to a third party, and the proceeds received by the Trust Fund as a result of such refinancing.

Section 9.06 Counterparts.

This Agreement may be executed simultaneously in any number of counterparts. Each counterpart shall be deemed to be an original, and all such counterparts shall constitute one and the same instrument.

Section 9.07 Place of Delivery and Governing Law.

This Agreement shall be deemed in effect when a fully executed counterpart thereof is received by the Seller in the State of New York and shall be deemed to have been made in the State of New York. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REFERENCE TO ITS CONFLICT OF LAW PROVISIONS (OTHER THAN SECTION 5-1401 OF THE GENERAL OBLIGATIONS LAW), AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

Section 9.08 Further Agreements.

The Seller, the Master Servicer and the Servicer each agree to execute and deliver to the other such reasonable and appropriate additional documents, instruments or agreements as may be necessary or appropriate to effectuate the purposes of this Agreement.

Section 9.09 Intention of the Parties.

It is the intention of the parties that the Seller is conveying, and the Servicer is receiving only a contract for servicing the Mortgage Loans. Accordingly, the parties hereby acknowledge that the Trust Fund remains the sole and absolute owner of the Mortgage Loans and all rights (other than the servicing rights) related thereto.

Section 9.10 Successors and Assigns; Assignment of Servicing Agreement.

This Agreement shall bind and inure to the benefit of and be enforceable by the Servicer, the Seller, the Trustee and the Master Servicer and their respective successors and assigns. This Agreement shall not be assigned, pledged or hypothecated by the Servicer to a third party except in accordance with Section 7.03 and shall not be assigned, pledged or hypothecated by the Seller, except as and to the extent provided in Section 9.11.

Section 9.11 Assignment by the Seller.

The Seller shall have the right, upon notice to but without the consent of the Servicer, to assign, in whole or in part (but exclusive of such Seller’s rights as owner of the servicing rights relating to the Mortgage Loans), its interest under this Agreement to the Depositor, which in turn shall assign such rights to the Trustee, and the Trustee then shall succeed to all rights of such Seller under this Agreement. All references to the Seller in this Agreement shall be deemed to include its assignee or designee and any subsequent assignee or designee, specifically including the Trustee, except with respect to the Seller’s retained servicing rights pursuant to Section 8.02(a)(iii).

The Seller shall have the right, upon notice to but without the consent of the Servicer, to assign, in whole or in part, its retained servicing rights. All references to the Seller in this Agreement, in its capacity as an owner of servicing rights, shall be deemed to include the assignee or designee and any subsequent assignee or designee, of such Seller’s rights arising pursuant to Section 8.02(a)(iii).

Section 9.12 Amendment.

This Agreement may be amended from time to time by the mutual written agreement signed by the Master Servicer, the Seller and the Servicer, provided that the party requesting such amendment shall, at its own expense, provide the Trustee, the Master Servicer and the Seller with an Opinion of Counsel that such amendment will not materially adversely affect the interest of the Certificateholders in the Mortgage Loans. Any such amendment shall be deemed not to adversely affect in any material respect any the interest of the Certificateholders in the Mortgage Loans, if the Trustee receives written confirmation from each Rating Agency that such amendment will not cause such Rating Agency to reduce, qualify or withdraw the then current rating assigned to the Certificates (and any Opinion of Counsel received by the Trustee, the Master Servicer and the Seller in connection with any such amendment may rely expressly on such confirmation as the basis therefor); provided, however, this Agreement may be amended by the Servicer, the Seller, the Master Servicer and the Trustee from time to time without the delivery of an Opinion of Counsel described above to the extent necessary, in the judgment of the Seller and its counsel, to comply with the rules of the Commission.

Section 9.13 Waivers.

No term or provision of this Agreement may be waived or modified unless such waiver or modification is in writing and signed by the party against whom such waiver or modification is sought to be enforced.

Section 9.14 Exhibits.

The exhibits to this Agreement are hereby incorporated and made a part hereof and are an integral part of this Agreement.

Section 9.15 Intended Third Party Beneficiaries.

Notwithstanding any provision herein to the contrary, the parties to this Agreement agree that it is appropriate, in furtherance of the intent of such parties as set forth herein, that the Trustee and the Depositor receive the benefit of the provisions of this Agreement as intended third party beneficiaries of this Agreement to the extent of such provisions. The Servicer shall have the same obligations to the Trustee and the Depositor as if they were parties to this Agreement, and the Trustee (acting through the Master Servicer), the Depositor shall have the same rights and remedies to enforce the provisions of this Agreement as if they were parties to this Agreement. The Servicer shall only take direction from the Master Servicer (if direction by the Master Servicer is required under this Agreement) unless otherwise directed by this Agreement or the Credit Risk Management Agreement. Notwithstanding the foregoing, all rights of the Trustee and the Depositor hereunder (other than the right to indemnification) and all rights and obligations of the Master Servicer and the Servicer hereunder (other than the right to indemnification) shall terminate upon the termination of the Trust Fund pursuant to the Trust Agreement.

Section 9.16 General Interpretive Principles.

For purposes of this Agreement, except as otherwise expressly provided or unless the context otherwise requires:

(a) the terms defined in this Agreement have the meanings assigned to them in this Agreement and include the plural as well as the singular, and the use of any gender herein shall be deemed to include the other gender;

(b) accounting terms not otherwise defined herein have the meanings assigned to them in accordance with generally accepted accounting principles;

(c) references herein to “Articles,” “Sections,” “Subsections,” “Paragraphs,” and other subdivisions without reference to a document are to designated Articles, Sections, Subsections, Paragraphs and other subdivisions of this Agreement;

(d) a reference to a Subsection without further reference to a Section is a reference to such Subsection as contained in the same Section in which the reference appears, and this rule shall also apply to Paragraphs and other subdivisions;

(e) the words “herein,” “hereof,” “hereunder” and other words of similar import refer to this Agreement as a whole and not to any particular provision; and

(f) the term “include” or “including” shall mean by reason of enumeration.

Section 9.17 Reproduction of Documents.

This Agreement and all documents relating thereto, including, without limitation, (a) consents, waivers and modifications which may hereafter be executed, (b) documents received by any party at the closing, and (c) financial statements, certificates and other information previously or hereafter furnished, may be reproduced by any photographic, photostatic, microfilm, micro-card, miniature photographic or other similar process. The parties agree that any such reproduction shall be admissible in evidence as the original itself in any judicial or administrative proceeding, whether or not the original is in existence and whether or not such reproduction was made by a party in the regular course of business, and that any enlargement, facsimile or further reproduction of such reproduction shall likewise be admissible in evidence.

Section 9.18 Protection of Confidential Information.

The Servicer shall keep confidential and shall not divulge to any party, without the Seller’s prior written consent, any nonpublic information pertaining to the Mortgage Loans or any borrower thereunder, except to the extent that it is appropriate for the Servicer to do so in working with legal counsel, auditors, taxing authorities or other governmental agencies or it is otherwise in accordance with Accepted Servicing Practices.

IN WITNESS WHEREOF, the Servicer, the Seller and the Master Servicer have caused their names to be signed hereto by their respective officers thereunto duly authorized as of the date first above written.

XXXXXX BROTHERS HOLDINGS INC.,

as Seller

By: /s/ Xxxxxxx X. Xxxxxxxx

Name: Xxxxxxx X. Xxxxxxxx

Title: Authorized Signatory

AURORA LOAN SERVICES LLC,

as Servicer

By: /s/ Xxxxx X. Xxxxxx

Name: Xxxxx X. Xxxxxx

Title: Assistant Vice President

AURORA LOAN SERVICES LLC,

as Master Servicer

By: /s/ Xxxxxx X. Xxxxxx

Name: Xxxxxx X. Xxxxxx

Title: Vice President

Acknowledged By:

CITIBANK, N.A.,

as Trustee

By: /s/ Xxxxx Xxxxxxxx

Name: Xxxxx Xxxxxxxx

Title: Vice President

EXHIBIT A

MORTGAGE LOAN SCHEDULE

(Including Prepayment Charge Schedule)

To be retained in a separate closing binder entitled “SASCO 2006-S4 Mortgage Loan Schedules” at Xxxxxx Xxxxxx LLP

A-1

EXHIBIT B

CUSTODIAL ACCOUNT CERTIFICATION NOTICE

_________, 20__

To:

Aurora Loan Services LLC

00000 Xxxx Xxxxxxx Xxxxx

Xxxxxxxxx, Xxxxxxxx 00000

Attention: Xxxxxx X. Xxxxxx (SASCO 2006-S4)

As Servicer under the Servicing Agreement dated as of December 1, 2006, among Aurora Loan Services LLC, as Servicer, Xxxxxx Brothers Holdings Inc., as Seller and you, as Master Servicer (the “Agreement”), we hereby certify to you that we have established an account at [insert name of financial institution], as a Custodial Account pursuant to Section 3.03 of the Agreement, to be designated as “Aurora Loan Services LLC, in trust for Citibank, N.A., as Trustee for Structured Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2006-S4.” All deposits in the account shall be subject to withdrawal therefrom by order signed by the Servicer.

AURORA LOAN SERVICES LLC

By:

Name:

Title:

B-1

EXHIBIT C

ESCROW ACCOUNT CERTIFICATION NOTICE

_______ __, 20__

To:

Aurora Loan Services LLC

00000 Xxxx Xxxxxxx Xxxxx

Xxxxxxxxx, Xxxxxxxx 00000

Attention: Xxxxxx X. Xxxxxx (SASCO 2006-S4)

As Servicer under the Servicing Agreement dated as of December 1, 2006, among Aurora Loan Services LLC, as Servicer, Xxxxxx Brothers Holdings Inc., as Seller and you, as Master Servicer (the “Agreement”), we hereby certify to you that we have established an account at [insert name of financial institution], as an Escrow Account pursuant to Section 3.05 of the Agreement, to be designated as “Aurora Loan Services LLC, in trust for Citibank, N.A., as Trustee for Structured Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2006-S4.” All deposits in the account shall be subject to withdrawal therefrom by order signed by the Servicer.

AURORA LOAN SERVICES LLC

By:

Name:

Title:

X-0

XXXXXXX X-0

FORM OF MONTHLY REMITTANCE ADVICE

FIELD NAME	DESCRIPTION	FORMAT
INVNUM	INVESTOR LOAN NUMBER	Number no decimals
SERVNUM	SERVICER LOAN NUMBER, REQUIRED	Number no decimals
BEGSCHEDBAL	BEGINNING SCHEDULED BALANCE FOR SCHED/SCHED	Number two decimals
	BEGINNING TRAIL BALANCE FOR ACTUAL/ACTUAL,
	REQUIRED
SCHEDPRIN	SCHEDULED PRINCIPAL AMOUNT FOR SCHEDULED/SCHEDULED	Number two decimals
	ACTUAL PRINCIPAL COLLECTED FOR ACTUAL/ACTUAL,
	REQUIRED, .00 IF NO COLLECTIONS
CURT1	CURTAILMENT 1 XXXXXX, .00 IF NOT APPLICABLE	Number two decimals
CURT1DATE	CURTAILMENT 1 DATE, BLANK IF NOT APPLICABLE	DD-MMM-YY
CURT1ADJ	CURTAILMENT 1 ADJUSTMENT, .00 IF NOT APPLICABLE	Number two decimals
CURT2	CURTAILMENT 2 XXXXXX, .00 IF NOT APPLICABLE	Number two decimals
CURT2DATE	CURTAILMENT 2 DATE, BLANK IF NOT APPLICABLE	DD-MMM-YY
CURT2ADJ	CURTAILMENT 2 ADJUSTMENT, .00 IF NOT APPLICABLE	Number two decimals
LIQPRIN	PAYOFF, LIQUIDATION PRINCIPAL, .00 IF NOT APPLICABLE	Number two decimals
OTHPRIN	OTHER PRINCIPAL, .00 IF NOT APPLICABLE	Number two decimals
PRINREMIT	TOTAL PRINCIPAL REMITTANCE AMOUNT, .00 IF NOT APPLICABLE	Number two decimals
INTREMIT	NET INTEREST REMIT, INCLUDE PAYOFF INTEREST,	Number two decimals
	.00 IF NOT APPLICABLE
TOTREMIT	TOTAL REMITTANCE AMOUNT, .00 IF NOT APPLICABLE	Number two decimals
ENDSCHEDBAL	ENDING SCHEDULED BALANCE FOR SCHEDULED/SCHEDULED	Number two decimals
	ENDING TRIAL BALANCE FOR ACTUAL/ACTUAL
	.00 IF PAIDOFF, LIQUIDATED OR FULL CHARGE OFF
ENDACTBAL	ENDING TRIAL BALANCE	Number two decimals
	.00 IF PAIDOFF, LIQUIDATED OR FULL CHARGE OFF
ENDDUEDATE	ENDING ACTUAL DUE DATE, NOT LAST PAID INSTALLMENT	DD-MMM-YY
ACTCODE	60 IF PAIDOFF, BLANK IF NOT APPLICABLE	Number no decimals
ACTDATE	ACTUAL PAYOFF DATE, BLANK IF NOT APPLICABLE	DD-MMM-YY
INTRATE	INTEREST RATE, REQUIRED	Number seven decimals
	Example .0700000 for 7.00%
SFRATE	SERVICE FEE RATE, REQUIRED	Number seven decimals
	Example .0025000 for .25%
PTRATE	PASS THRU RATE, REQUIRED	Number seven decimals
	Example .0675000 for 6.75%
PIPMT	P&I CONSTANT, REQUIRED	Number two decimals
	.00 IF PAIDOFF

X-0-0

XXXXXXX X-0

XXXXXXXX XXXXXX FOR MONTHLY DEFAULTED LOAN REPORT

Data Field	Format			Data Description
% of MI coverage	NUMBER(6,5)			The percent of coverage provided by the PMI company in the event of loss on a defaulted loan.
Actual MI claim filed date	DATE(MM/DD/YYYY)			Actual date that the claim was submitted to the PMI company.
Actual bankruptcy start date	DATE(MM/DD/YYYY)			Actual date that the bankruptcy petition is filed with the court.
Actual MI claim amount filed	NUMBER(15,2)			The amount of the claim that was filed by the servicer with the PMI company.
Actual discharge date	DATE(MM/DD/YYYY)			Actual date that the Discharge Order is entered in the bankruptcy docket.
Actual due date	DATE(MM/DD/YYYY)			Actual due date of the next outstanding payment amount due from the mortgagor.
Actual eviction complete date	DATE(MM/DD/YYYY)			Actual date that the eviction proceedings are completed by local counsel.
Actual eviction start date	DATE(MM/DD/YYYY)			Actual date that the eviction proceedings are commenced by local counsel.
Actual first legal date	DATE(MM/DD/YYYY)			Actual date that foreclosure counsel filed the first legal action as defined by state statute.
Actual redemption end date	DATE(MM/DD/YYYY)			Actual date that the foreclosure redemption period expires.
Bankruptcy chapter	VARCHAR2(2)	7= Chapter 7 filed 12= Chapter 12 filed	11= Chapter 11 filed 13= Chapter 13 filed	Chapter of bankruptcy filed.
Bankruptcy flag	VARCHAR2(2)	Y=Active Bankruptcy	N=No Active Bankruptcy	Servicer defined indicator that identifies that the property is an asset in an active bankruptcy case.
Bankruptcy Case Number	VARCHAR2(15)			The court assigned case number of the bankruptcy filed by a party with interest in the property.
MI claim amount paid	NUMBER(15,2)			The amount paid to the servicer by the PMI company as a result of submitting an MI claim.

D-2-1

MI claim funds received date	DATE(MM/DD/YYYY)			Actual date that funds were received from the PMI company as a result of transmitting an MI claim.
Current loan amount	NUMBER(10,2)			Current unpaid principal balance of the loan as of the date of reporting to Aurora Master Servicing.
Date FC sale scheduled	DATE(MM/DD/YYYY)			Date that the foreclosure sale is scheduled to be held.
Date relief/dismissal granted	DATE(MM/DD/YYYY)			Actual date that the dismissal or relief from stay order is entered by the bankruptcy court.
Date REO offer accepted	DATE(MM/DD/YYYY)			Actual date of acceptance of an REO offer.
Date REO offer received	DATE(MM/DD/YYYY)			Actual date of receipt of an REO offer.
Delinquency value	NUMBER(10,2)			Value obtained typically from a BPO prior to foreclosure referral not related to loss mitigation activity.
Delinquency value source	VARCHAR2(15)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Name of vendor or management company that provided the delinquency valuation amount.
Delinquency value date	DATE(MM/DD/YYYY)			Date that the delinquency valuation amount was completed by vendor or property management company.
Delinquency flag	VARCHAR2(2)	Y= 90+ delinq. Not in FC, Bky or Loss mit	N=Less than 90 days delinquent	Servicer defined indicator that identifies that the loan is delinquent but is not involved in loss mitigation, foreclosure, bankruptcy or REO.
Foreclosure flag	VARCHAR2(2)	Y=Active foreclosure	N=No active foreclosure	Servicer defined indicator that identifies that the loan is involved in foreclosure proceedings.
Corporate expense balance	NUMBER(10,2)			Total of all cumulative expenses advanced by the servicer for non-escrow expenses such as but not limited to: FC fees and costs, bankruptcy fees and costs, property preservation and property inspections.
Foreclosure attorney referral date	DATE(MM/DD/YYYY)			Actual date that the loan was referred to local counsel to begin foreclosure proceedings.
Foreclosure valuation amount	NUMBER(15,2)			Value obtained during the foreclosure process. Usually as a result of a BPO and typically used to calculate the bid.
Foreclosure valuation date	DATE(MM/DD/YYYY)			Date that foreclosure valuation amount was completed by vendor or property management company.

D-2-2

Foreclosure valuation source	VARCHAR2(80)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Name of vendor or management company that provided the foreclosure valuation amount.
FHA 27011A transmitted date	DATE(MM/DD/YYYY)			Actual date that the FHA 27011A claim was submitted to HUD.
FHA 27011 B transmitted date	DATE(MM/DD/YYYY)			Actual date that the FHA 27011B claim was submitted to HUD.
VA LGC/ FHA Case number	VARCHAR2(15)			Number that is assigned individually to the loan by either HUD or VA at the time of origination. The number is located on the Loan Guarantee Certificate (LGC) or the Mortgage Insurance Certificate (MIC).
FHA Part A funds received date	DATE(MM/DD/YYYY)			Actual date that funds were received from HUD as a result of transmitting the 27011A claim.
Foreclosure actual sale date	DATE(MM/DD/YYYY)			Actual date that the foreclosure sale was held.
Servicer loan number	VARCHAR2(15)			Individual number that uniquely identifies loan as defined by servicer.
Loan type	VARCHAR2(2)	1=FHA Residential 3=Conventional w/o PMI 5=FHA Project 7=HUD 235/265 9=Farm Loan S=Sub prime	2=VA Residentia 4=Commercial 6=Conventional w/PMI 8=Daily Simple Interest Loan U=Unknown	Type of loan being serviced generally defined by the existence of certain types of insurance (i.e.: FHA, VA, conventional insured, conventional uninsured, SBA, etc.).
Loss mit approval date	DATE(MM/DD/YYYY)			The date determined that the servicer and mortgagor agree to pursue a defined loss mitigation alternative.
Loss mit flag	VARCHAR2(2)	Y= Active loss mitigation	N=No active loss mitigation	Servicer defined indicator that identifies that the loan is involved in completing a loss mitigation alternative.
Loss mit removal date	DATE(MM/DD/YYYY)			The date that the mortgagor is denied loss mitigation alternatives or the date that the loss mitigation alternative is completed resulting in a current or liquidated loan.

D-2-3

Loss mit type	VARCHAR2(2)	L= Loss Mitigation NP=Pending non-performing sale DI= Deed in lieu MO=Modification SH=Short sale	LT=Litigation pending CH= Charge off FB= Forbearance plan PC=Partial claim VA=VA refunding	The defined loss mitigation alternative identified on the loss mit approval date.
Loss mit value	NUMBER(10,2)			Value obtained typically from a BPO prior to foreclosure sale intended to aid in the completion of loss mitigation activity.
Loss mit value date	DATE(MM/DD/YYYY)			Name of vendor or management company that provided the loss mitigation valuation amount.
Loss mit value source	VARCHAR2(15)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Date that the loss mitigation valuation amount was completed by vendor or property management company.
MI certificate number	VARCHAR2(15)			A number that is assigned individually to the loan by the PMI company at the time of origination. Similar to the VA LGC/FHA Case Number in purpose.
LPMI Cost	NUMBER(7,7)			The current premium paid to the PMI company for Lender Paid Mortgage Insurance.
Occupancy status	VARCHAR2(1)	O=Owner occupied U=Unknown	T=Tenant occupied V=Vacant	The most recent status of the property regarding who if anyone is occupying the property. Typically a result of a routine property inspection.
First Vacancy date/ Occupancy status date	DATE(MM/DD/YYYY)			The date that the most recent occupancy status was determined. Typically the date of the most recent property inspection.
Original loan amount	NUMBER(10,2)			Amount of the contractual obligations (i.e.: note and mortgage/deed of trust).
Original value amount	NUMBER(10,2)			Appraised value of property as of origination typically determined through the appraisal process.
Origination date	DATE(MM/DD/YYYY)			Date that the contractual obligations (i.e.: note and mortgage/deed of trust) of the mortgagor was executed.

D-2-4

FHA Part B funds received date	DATE(MM/DD/YYYY)			Actual date that funds were received from HUD as a result of transmitting the 27011B claim.
Post petition due date	DATE(MM/DD/YYYY)			The post petition due date of a loan involved in a chapter 13 bankruptcy.
Property condition	VARCHAR2(2)	1= Excellent 3=Average 5=Poor	2=Good 4=Fair 6=Very poor	Physical condition of the property as most recently reported to the servicer by vendor or property management company.
Property type	VARCHAR2(2) 3=Condo 6=Prefabricated 7=Mobile home A=Church O=Co-op CT=Condotel	1=Single family 4=Multifamily B=Commercial U=Unknown P=PUD M=Manufactured housing MU=Mixed use	2=Town house 5=Other C=Land only D=Farm R=Row house 24= 2-4 family	Type of property secured by mortgage such as: single family, 2-4 unit, etc.

D-2-5

Reason for default	VARCHAR2(3)	001=Death of principal mtgr 003=Illness of mtgr's family member 004=Death of mtgr's family member 006=Curtailment of income 008=Abandonment of property 011=Property problem 013=Inability to rent property 015=Other 017=Business failure 022=Energy-Environment costs 026= Payment adjustment 029=Transfer ownership pending 031=Unable to contact borrower	002=Illness of principal mtgr 005=Marital difficulties 007=Excessive obligations 009=Distant employee transfer 012=Inability to sell property 014=Military service 016=Unemployment 019=Casualty loss 023= Servicing problems 027=Payment dispute 030=Fraud INC=Incarceration	Cause of delinquency as identified by mortgagor.
REO repaired value	NUMBER(10,2)			The projected value of the property that is adjusted from the "as is" value assuming necessary repairs have been made to the property as determined by the vendor/property management company.
REO list price adjustment amount	NUMBER(15,2)			The most recent listing/pricing amount as updated by the servicer for REO properties.
REO list price adjustment date	DATE(MM/DD/YYYY)			The most recent date that the servicer advised the agent to make an adjustment to the REO listing price.
REO value (as is)	NUMBER(10,2)			The value of the property without making any repairs as determined by the vendor/property management company.
REO actual closing date	DATE(MM/DD/YYYY)			The actual date that the sale of the REO property closed escrow.
REO flag	VARCHAR2(7)	Y=Active REO	N=No active REO	Servicer defined indicator that identifies that the property is now Real Estate Owned.
REO original list date	DATE(MM/DD/YYYY)			The initial/first date that the property was listed with an agent as an REO.

D-2-6

REO original list price	NUMBER(15,2)			The initial/first price that was used to list the property with an agent as an REO.
REO net sales proceeds	NUMBER(10,2)			The actual REO sales price less closing costs paid. The net sales proceeds are identified within the HUD1 settlement statement.
REO sales price	NUMBER(10,2)			Actual sales price agreed upon by both the purchaser and servicer as documented on the HUD1 settlement statement.
REO scheduled close date	DATE(MM/DD/YYYY)			The date that the sale of the REO property is scheduled to close escrow.
REO value date	DATE(MM/DD/YYYY)			Date that the vendor or management company completed the valuation of the property resulting in the REO value (as is).
REO value source	VARCHAR2(15)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Name of vendor or management company that provided the REO value (as is).
Repay first due date	DATE(MM/DD/YYYY)			The due date of the first scheduled payment due under a forbearance or repayment plan agreed to by both the mortgagor and servicer.
Repay next due date	DATE(MM/DD/YYYY)			The due date of the next outstanding payment due under a forbearance or repayment plan agreed to by both the mortgagor and servicer.
Repay plan broken/reinstated/closed date	DATE(MM/DD/YYYY)			The servicer defined date upon which the servicer considers that the plan is no longer in effect as a result of plan completion or mortgagor's failure to remit payments as scheduled.
Repay plan created date	DATE(MM/DD/YYYY)			The date that both the mortgagor and servicer agree to the terms of a forbearance or repayment plan.
SBO loan number	NUMBER(9)			Individual number that uniquely identifies loan as defined by Aurora Master Servicing.
Escrow balance/advance balance	NUMBER(10,2)			The positive or negative account balance that is dedicated to payment of hazard insurance, property taxes, MI, etc. (escrow items only).
Title approval letter received date	DATE(MM/DD/YYYY)			The actual date that the title approval was received as set forth in the HUD title approval letter.
Title package HUD/VA date	DATE(MM/DD/YYYY)			The actual date that the title package was submitted to either HUD or VA.

D-2-7

VA claim funds received date	DATE(MM/DD/YYYY)			The actual date that funds were received by the servicer from the VA for the expense claim submitted by the servicer.
VA claim submitted date	DATE(MM/DD/YYYY)			The actual date that the expense claim was submitted by the servicer to the VA.
VA first funds received amount	NUMBER(15,2)			The amount of funds received by the servicer from VA as a result of the specified bid.
VA first funds received date	DATE(MM/DD/YYYY)			The date that the funds from the specified bid were received by the servicer from the VA.
VA XXX submitted date	DATE(MM/DD/YYYY)			Actual date that the Notice of Election to Convey was submitted to the VA.
Zip Code	VARCHAR2(5)			U.S. postal zip code that corresponds to property location.
FNMA Delinquency status code	VARCHAR2(3) 24=Drug seizure 28=Modification 31=Probate 44=Deed-in-lieu 62=VA no-bid 65=Ch. 7 bankruptcy	09=Forbearance 26=Refinance 29=Charge-off 32=Military indulgence 49=Assignment 63=VA Refund 66=Ch. 11 bankruptcy	17=Preforeclosure sale 27=Assumption 30=Third-party sale 43=Foreclosure 61=Second lien considerations 64=VA Buydown 67=Ch. 13 bankruptcy	The code that is electronically reported to FNMA by the servicer that reflects the current defaulted status of a loan (i.e.: 65, 67, 43 or 44).

D-2-8

FNMA delinquency reason code	VARCHAR2(3)	001=Death of principal mtgr 003=Illness of mtgr's family member 005=Marital difficulties 007=Excessive obligations 009=Distant employee transfer 012=Inability to sell property 014=Military service 016=Unemployment 019=Casualty loss 023= Servicing problems 027=Payment dispute 030=Fraud INC=Incarceration	002=Illness of principal mtgr 004=Death of mtgr's family member 006=Curtailment of income 008=Abandonment of property 011=Property problem 013=Inability to rent property 015=Other 017=Business failure 022=Energy-Environment costs 026= Payment adjustment 029=Transfer ownership pending 031=Unable to contact borrower	The code that is electronically reported to FNMA by the servicer that describes the circumstance that appears to be the primary contributing factor to the delinquency.
Suspense balance	NUMBER(10,2)			Money submitted to the servicer, credited to the mortgagor's account but not allocated to principal, interest, escrow, etc.
Restricted escrow balance	NUMBER(10,2)			Money held in escrow by the mortgage company through completion of repairs to property.
Investor number	NUMBER (10,2)			Unique number assigned to a group of loans in the servicing system.

X-0-0

XXXXXXX X-0

FORM OF LOAN LOSS REPORT


Final Report Field Heading	Definition	Format
Servicer Cut Off Date	Reporting cycle cut off date	DATE(MM/DD/YYYY)
Servicer Loan Number	Individual number that uniquely identifies loan as defined by servicer.	VARCHAR2(15)
Investor Loan Number	Individual number that uniquely identifies loan as defined by Aurora Master Servicing.	NUMBER(9)
Servicer Customer Number	Unique number assigned to each servicer	NUMBER(3)
Investor ID	Unique number assigned to a group of loans in the servicing system.	NUMBER (10,2)
Resolution Type	Description of the process to resolve the delinquency. Ex. Foreclosure, Short Sale, Third Party Sale, Deed In Lieu, etc.	VARCHAR2(15)
Resolution Date	Date the process described in Resolution Type was completed.	DATE(MM/DD/YYYY)
Liquidation Date	Date the loan was liquidated on the servicers servicing system.	DATE(MM/DD/YYYY)
REO Sale Date	Actual date that the sale of the REO property closed escrow.	DATE(MM/DD/YYYY)
Title Date	Date clear title was recorded.	DATE(MM/DD/YYYY)
MI Percent	Percent of coverage provided by the PMI company in the event of loss on a defaulted loan.	NUMBER(6,5)
First Legal Date	Actual date that foreclosure counsel filed the first legal action as defined by state statute.	DATE(MM/DD/YYYY)
Bankruptcy 1 Filing Date	Actual date the bankruptcy petition is filed with the court.	DATE(MM/DD/YYYY)
Bankruptcy 1 Relief Date	Actual date the Discharge, Dismissal or Relief Order is entered in the bankruptcy docket.	DATE(MM/DD/YYYY)
Bankruptcy 2 Filing Date	Actual date the bankruptcy petition is filed with the court.	DATE(MM/DD/YYYY)
Bankruptcy 2 Relief Date	Actual date the Discharge, Dismissal or Relief Order is entered in the bankruptcy docket.	DATE(MM/DD/YYYY)

D-3-1

Foreclosure Fees	Amount paid to the Foreclosure Attorney for performing his service.	NUMBER(10,2)
Foreclosure Costs	Amount incurred as part of the foreclosure process.	NUMBER(10,2)
Bankruptcy Costs	Amount incurred related to a bankruptcy filing involving the borrower or subject property.	NUMBER(10,2)
Eviction Costs	Amount incurred related to the eviction process.	NUMBER(10,2)
Appraisal Costs	Amount incurred to acquire a value for the subject property.	NUMBER(10,2)
Preservation Costs	Amount incurred to preserve and secure the property.	NUMBER(10,2)
Utility Costs	Amount incurred for utilities at the property.	NUMBER(10,2)
HOA Costs	Amount paid to the Home Owners Association to maintain the property dues.	NUMBER(10,2)
Other Costs	Amount of Miscellaneous Expenses incurred during the default process.	NUMBER(10,2)
Interest on Advances	Interest paid by HUD/VA or MI on the amounts advanced related to the liquidation of the property.	NUMBER(10,2)
Hazard Refunds	Amount of refunds of Hazard Premiums paid.	NUMBER(10,2)
Real Estate Taxes	Amount of any taxes paid during the default process.	NUMBER(10,2)
Hazard Premiums	Amount paid for Hazard Insurance on the property held as collateral for the mortgage.	NUMBER(10,2)
MI Premiums	Amount paid for Mortgage Insurance related to the mortgage loan.	NUMBER(10,2)
Other Escrow	Miscellaneous Expenses incurred from the escrow account during the default process.	NUMBER(10,2)
Sales Proceeds	Funds received in connection with the sale of the property held as collateral for the mortgage loan (Positive Number).	NUMBER(10,2)
Initial Claim Proceeds	Funds received in connection with the conveyance of the property to the insuring agency (Positive Number).	NUMBER(10,2)
Final Claim Proceeds	Claim funds received from the insuring agency (HUD/VA).	NUMBER(10,2)

D-3-2

Other Proceeds	Miscellaneous funds received in connection with the property held as collateral for the mortgage loan (Positive Number).	NUMBER(10,2)
Escrow Balance	Any positive balance remaining in the escrow account.	NUMBER(10,2)
Replacement Reserve Bal	Amount of funds held in the Replacement Reserve account (Positive Number).	NUMBER(10,2)
Restricted Escrow Bal	Amount of funds held in the Restricted Escrow account.	NUMBER(10,2)
Suspense Balance	Amount of funds held in the Suspense account (Positive Number).	NUMBER(10,2)
Servicer Retained Loss	The total amount of the Gross Final Actual (Loss)/Gain the servicer will take, due to Interest/Expense Curtailments by HUD/VA (This would include Advances not claimed to HUD/VA or MI due to servicer error) (Positive Number).	NUMBER(10,2)

D-3-3

EXHIBIT E

SASCO 2006-S4 Trust Agreement

E-1

EXHIBIT F

[Date]

FORM OF ANNUAL CERTIFICATION

Re:

The Servicing Agreement dated as of December 1, 2006 (the “Agreement”), by and among Xxxxxx Brothers Holdings Inc., Aurora Loan Services LLC (the “Servicer,” in such capacity and the “Master Servicer,” in such capacity), and acknowledged by Citibank, N.A., as Trustee (the “Trustee”).

I, [identify the certifying individual], the [title] of the Servicer, certify to the Trustee, the Master Servicer and Structured Asset Securities Corporation (the “Depositor”), and their officers, with the knowledge and intent that they will rely upon this certification, that:

(1) I have reviewed the servicer compliance statement of the Servicer provided in accordance with Item 1123 of Regulation AB (the “Compliance Statement”), the report on assessment of the Company’s compliance with the servicing criteria set forth in Item 1122(d) of Regulation AB (the “Servicing Criteria”), provided in accordance with Rules 13a-18 and 15d-18 under Securities Exchange Act of 1934, as amended (the “Exchange Act”) and Item 1122 of Regulation AB (the “Servicing Assessment”), the registered public accounting firm’s attestation report provided in accordance with Rules 13a-18 and 15d-18 under the Exchange Act and Section 1122(b) of Regulation AB (the “Attestation Report”), and all servicing reports, officer’s certificates and other information relating to the servicing of the Mortgage Loans by the Servicer during 200[ ] that were delivered by the Servicer to any of the Depositor, the Master Servicer and the Trustee pursuant to the Agreement (collectively, the “Company Servicing Information”);

(2) Based on my knowledge, the Company Servicing Information, taken as a whole, does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in the light of the circumstances under which such statements were made, not misleading with respect to the period of time covered by the Company Servicing Information;

(3) Based on my knowledge, all of the Company Servicing Information required to be provided by the Company under the Agreement has been provided to the Depositor, the Master Servicer and the Trustee;

(4) I am responsible for reviewing the activities performed by the Servicer as servicer under the Agreement, and based on my knowledge and the compliance review conducted in preparing the Compliance Statement and except as disclosed in the Compliance Statement, the Servicing Assessment or the Attestation Report, the Servicer has fulfilled its obligations under the Agreement in all material respects; and

F-1

(5) The Compliance Statement required to be delivered by the Servicer pursuant to the Agreement, and the Servicing Assessment and Attestation Report required to be provided by the Servicer and by any Subservicer or Subcontractor pursuant to the Agreement, have been provided to the Depositor, the Master Servicer and the Trustee. Any material instances of noncompliance described in such reports have been disclosed to the Depositor, the Master Servicer and the Trustee. Any material instance of noncompliance with the Servicing Criteria has been disclosed in such reports.

Date: _________________________

AURORA LOAN SERVICES LLC

By: ________________________________

Name:

Title:

F-2

EXHIBIT G-1

[Reserved]

G-1-1

EXHIBIT G-2

[Reserved]

G-2-1

EXHIBIT H

XXXXXX XXX GUIDE NO. 95-19

Reference

	·	Selling	This announcement amends the guide(s) indicated.
	·	Servicing	Please keep it for reference until we issue a formal change.

Subject “Full-File” Reporting to Credit Repositories

Part IV, Section 107, of the servicing Guide currently requires servicers to report only 90-day delinquencies to the four major credit repositories. To ensure that the repositories have up-to-date information for both servicing and origination activity, we have decided to begin requiring -- as of the month ending March 31, 1996 -- servicers to provide the credit repositories a “full-file” status report for the mortgages they service for us.

“Full-file” reporting requires that servicers submit a monthly report to each of the credit repositories to describe the exact status for each mortgage they service for us. The status reported generally should be the one in effect as of the last business day of each month. Servicers may, however, use a slightly later cut-off date -- for example, at the and of the first week of a month -- to assure that payment corrections, returned checks, and other adjustments related to the previous month’s activity can be appropriately reflected in their report for that month. Statuses that must be reported for any given mortgage include the following: new origination, current, delinquent (30-, 60-, 90-days, etc.), foreclosed, and charged-off. (The credit repositories will provide the applicable codes for reporting these statuses to them.) A listing of each of the major repositories to which “full-file” status reports must be sent is attached.

Servicers are responsible for the complete and accurate reporting of mortgage status information to the repositories and for resolving any disputes that arise about the information they report. Servicers must respond promptly to any inquiries from borrowers regarding specific mortgage status information about them that was reported to the credit repositories.

Servicers should contact their Customer Account Team in their lead Xxxxxx Mae regional office if they have any questions about this expanded reporting requirement.

Xxxxxx X. Engeletad

Senior Vice President - Mortgage and Lender Standards

11/20/95

H-1

XXXXXX MAE GUIDE 95-19

ATTACHMENT 1

ANNOUNCEMENT

Major Credit Repositories

A “full-file” status report for each mortgage serviced for Xxxxxx Xxx must be sent to the following repositories each month (beginning with the month ending March 31, 1996):

Company	Telephone Number
Consumer Credit Associates, Inc.	Call (000) 000-0000, either extension
000 Xxxxxxxxxxxx Xxxxxx, Xxxxx 000	150, 101, or 112, for all inquiries.
Xxxxxxx, Xxxxx 00000-0000

Equifax	Members that have an account number may call their local sales representative for all inquiries; lenders that need to set up an account should call (000) 000-0000 and select the customer assistance option.

TRW Information Systems & Services	Call (000) 000-0000 for all inquiries,
000 XXX Xxxxxxx	current members should select option 3;
Xxxxx, Xxxxx 00000	lenders that need to set up an account
	should select Option 4.

Trans Union Corporation	Call (000) 000-0000 to get the name of
555 West Xxxxx	the local bureau to contact about setting
Xxxxxxx, Xxxxxxxx 00000	up an account or obtaining other
information.

11/20/95

H-2

EXHIBIT I

[Reserved]

I-1

EXHIBIT J

SERVICING CRITERIA TO BE ADDRESSED IN REPORT ON

ASSESSMENT OF COMPLIANCE

The Servicer shall address, at a minimum, the criteria identified as below as “Applicable Servicing Criteria”, as identified by a xxxx in the column titled “Applicable Servicing Criteria”:


*Servicing Criteria*		*Applicable Servicing Criteria*
Reference	Criteria
	General Servicing Considerations
1122(d)(1)(i)	Policies and procedures are instituted to monitor any performance or other triggers and events of default in accordance with the transaction agreements.	X
1122(d)(1)(ii)	If any material servicing activities are outsourced to third parties, policies and procedures are instituted to monitor the third party’s performance and compliance with such servicing activities.	X
1122(d)(1)(iii)	Any requirements in the transaction agreements to maintain a back-up servicer for the mortgage loans are maintained.
1122(d)(1)(iv)	A fidelity bond and errors and omissions policy is in effect on the party participating in the servicing function throughout the reporting period in the amount of coverage required by and otherwise in accordance with the terms of the transaction agreements.	X
	Cash Collection and Administration
1122(d)(2)(i)	Payments on mortgage loans are deposited into the appropriate custodial bank accounts and related bank clearing accounts no more than two business days following receipt, or such other number of days specified in the transaction agreements.	X
1122(d)(2)(ii)	Disbursements made via wire transfer on behalf of an obligor or to an investor are made only by authorized personnel.	X
1122(d)(2)(iii)	Advances of funds or guarantees regarding collections, cash flows or distributions, and any interest or other fees charged for such advances, are made, reviewed and approved as specified in the transaction agreements.	X
1122(d)(2)(iv)	The related accounts for the transaction, such as cash reserve accounts or accounts established as a form of overcollateralization, are separately maintained (e.g., with respect to commingling of cash) as set forth in the transaction agreements.	X
1122(d)(2)(v)	Each custodial account is maintained at a federally insured depository institution as set forth in the transaction agreements. For purposes of this criterion, “federally insured depository institution” with respect to a foreign financial institution means a foreign financial institution that meets the requirements of Rule 13k-1(b)(1) of the Securities Exchange Act.	X
1122(d)(2)(vi)	Unissued checks are safeguarded so as to prevent unauthorized access.	X
1122(d)(2)(vii)	Reconciliations are prepared on a monthly basis for all asset-backed securities related bank accounts, including custodial accounts and related bank clearing accounts. These reconciliations are (A) mathematically accurate; (B) prepared within 30 calendar days after the bank statement cutoff date, or such other number of days specified in the transaction agreements; (C) reviewed and approved by someone other than the person who prepared the reconciliation; and (D) contain explanations for reconciling items. These reconciling items are resolved within 90 calendar days of their original identification, or such other number of days specified in the transaction agreements.	X

J-1


*Servicing Criteria*		*Applicable Servicing Criteria*
	Investor Remittances and Reporting
1122(d)(3)(i)	Reports to investors, including those to be filed with the Commission, are maintained in accordance with the transaction agreements and applicable Commission requirements. Specifically, such reports (A) are prepared in accordance with timeframes and other terms set forth in the transaction agreements; (B) provide information calculated in accordance with the terms specified in the transaction agreements; (C) are filed with the Commission as required by its rules and regulations; and (D) agree with investors’ or the trustee’s records as to the total unpaid principal balance and number of mortgage loans serviced by the Servicer.	X
1122(d)(3)(ii)	Amounts due to investors are allocated and remitted in accordance with timeframes, distribution priority and other terms set forth in the transaction agreements.	X
1122(d)(3)(iii)	Disbursements made to an investor are posted within two business days to the Servicer’s investor records, or such other number of days specified in the transaction agreements.	X
1122(d)(3)(iv)	Amounts remitted to investors per the investor reports agree with cancelled checks, or other form of payment, or custodial bank statements.	X
	Pool Asset Administration
1122(d)(4)(i)	Collateral or security on mortgage loans is maintained as required by the transaction agreements or related mortgage loan documents.	X
1122(d)(4)(ii)	Mortgage loan and related documents are safeguarded as required by the transaction agreements	X
1122(d)(4)(iii)	Any additions, removals or substitutions to the asset pool are made, reviewed and approved in accordance with any conditions or requirements in the transaction agreements.	X
1122(d)(4)(iv)	Payments on mortgage loans, including any payoffs, made in accordance with the related mortgage loan documents are posted to the Servicer’s obligor records maintained no more than two business days after receipt, or such other number of days specified in the transaction agreements, and allocated to principal, interest or other items (e.g., escrow) in accordance with the related mortgage loan documents.	X
1122(d)(4)(v)	The Servicer’s records regarding the mortgage loans agree with the Servicer’s records with respect to an obligor’s unpaid principal balance.	X
1122(d)(4)(vi)	Changes with respect to the terms or status of an obligor's mortgage loans (e.g., loan modifications or re-agings) are made, reviewed and approved by authorized personnel in accordance with the transaction agreements and related pool asset documents.	X
1122(d)(4)(vii)	Loss mitigation or recovery actions (e.g., forbearance plans, modifications and deeds in lieu of foreclosure, foreclosures and repossessions, as applicable) are initiated, conducted and concluded in accordance with the timeframes or other requirements established by the transaction agreements.	X
1122(d)(4)(viii)	Records documenting collection efforts are maintained during the period a mortgage loan is delinquent in accordance with the transaction agreements. Such records are maintained on at least a monthly basis, or such other period specified in the transaction agreements, and describe the entity’s activities in monitoring delinquent mortgage loans including, for example, phone calls, letters and payment rescheduling plans in cases where delinquency is deemed temporary (e.g., illness or unemployment).	X
1122(d)(4)(ix)	Adjustments to interest rates or rates of return for mortgage loans with variable rates are computed based on the related mortgage loan documents.	X
1122(d)(4)(x)	Regarding any funds held in trust for an obligor (such as escrow accounts): (A) such funds are analyzed, in accordance with the obligor’s mortgage loan documents, on at least an annual basis, or such other period specified in the transaction agreements; (B) interest on such funds is paid, or credited, to obligors in accordance with applicable mortgage loan documents and state laws; and (C) such funds are returned to the obligor within 30 calendar days of full repayment of the related mortgage loans, or such other number of days specified in the transaction agreements.	X

J-2


*Servicing Criteria*		*Applicable Servicing Criteria*
1122(d)(4)(xi)	Payments made on behalf of an obligor (such as tax or insurance payments) are made on or before the related penalty or expiration dates, as indicated on the appropriate bills or notices for such payments, provided that such support has been received by the servicer at least 30 calendar days prior to these dates, or such other number of days specified in the transaction agreements.	X
1122(d)(4)(xii)	Any late payment penalties in connection with any payment to be made on behalf of an obligor are paid from the servicer’s funds and not charged to the obligor, unless the late payment was due to the obligor’s error or omission.	X
1122(d)(4)(xiii)	Disbursements made on behalf of an obligor are posted within two business days to the obligor’s records maintained by the servicer, or such other number of days specified in the transaction agreements.	X
1122(d)(4)(xiv)	Delinquencies, charge-offs and uncollectible accounts are recognized and recorded in accordance with the transaction agreements.	X
1122(d)(4)(xv)	Any external enhancement or other support, identified in Item 1114(a)(1) through (3) or Item 1115 of Regulation AB, is maintained as set forth in the transaction agreements.

J-3

EXHIBIT K

TRANSACTION PARTIES


Trustee	Citibank, N.A.

Securities Administrator	N/A

Master Servicer	Aurora Loan Services LLC

Credit Risk Manager	Xxxxxxx Fixed Income Services Inc.

PMI Insurer(s)	N/A

Interest Rate Swap Counterparty	Wachovia Bank, National Association

Servicer(s)	Aurora Loan Services LLC

Originator(s)	Xxxxxx Brothers Bank, FSB

Custodian(s)	U.S. Bank National Association, LaSalle Bank National Association

Seller	Xxxxxx Brothers Holdings Inc.

Sponsor	Xxxxxx Brothers Holdings Inc.

Depositor	Structured Asset Securities Corporation

K-1

EXHIBIT L

FORM OF ANNUAL OFFICER’S CERTIFICATE

Via Overnight Delivery

[DATE]

To:

Aurora Loan Services LLC

00000 Xxxx Xxxxxxx Xxxxx

Xxxxxxxxx, Xxxxxxxx 00000

Attention: Xxxxxx X. Xxxxxx (SASCO 2006-S4)

RE:

Annual officer’s certificate delivered pursuant to Section 5.03 of that certain servicing agreement, dated as of December 1, 2006 (the “Agreement”), by and among Xxxxxx Brothers Holdings Inc., Aurora Loan Services LLC, as servicer (the “Servicer”) and as master servicer, and acknowledged by Citibank, N.A., as Trustee, relating to the issuance of the Structured Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2006-S4.

[_______], the undersigned, a duly authorized [_______] of [the Servicer][Name of Subservicer], does hereby certify the following for the [calendar year][identify other period] ending on December 31, 20[__]:

1.	A review of the activities of the Servicer during the preceding calendar year (or portion thereof) and of its performance under the Agreement for such period has been made under my supervision.

To the best of my knowledge, based on such review, the Servicer has fulfilled all of its obligations under the Agreement in all material respects throughout such year (or applicable portion thereof), or, if there has been a failure to fulfill any such obligation in any material respect, I have specifically identified to the Master Servicer, the Depositor and the Trustee each such failure known to me and the nature and status thereof, including the steps being taken by the Servicer to remedy such default.

Certified By:

______________________________

Name:

Title:

L-1

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AURORA LOAN SERVICES LLC, as Servicer LEHMAN BROTHERS HOLDINGS INC., as Seller and AURORA LOAN SERVICES LLC as Master Servicer Structured Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2006-S4 SERVICING AGREEMENT Dated as of...

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