Common use of Signature Guarantee Clause in Contracts

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. ASSIGNMENT FORM To assign this Note, fill in the form below:

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the RegistrarTransfer Agent, which requirements will include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") STAMP or such other "signature guarantee program" as may be determined by the Registrar Transfer Agent in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amendedAct.)

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "“eligible guarantor institution" ” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("“STAMP"”) or such other "“signature guarantee program" ” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. Assignment Form To assign this Note, fill in the form below:

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" that is a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities and Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation institution participating in the Security Transfer Agent Medallion Program ("STAMP") or such other "a signature guarantee program" as may be determined program approved by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amendedTransfer Association.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" that is a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities and Exchange Act of 1934, as amended.. REVERSE OF DEBENTURE ____% JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURE

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amendedAct.)

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. 103 ================================================================================ CHESAPEAKE ENERGY CORPORATION and the Guarantors named herein ----------------------------------------

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" ", that is, a bank, stockbroker, saving and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Debenture Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Security Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Security Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. Form of Supplemental Indenture in Respect of Note Guarantee

Signature Guarantee. (Signature must be guaranteed) Note: Signatures must be guaranteed by an "“eligible guarantor institution" ” meeting the requirements of the Security Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("“STAMP"”) or such other "“signature guarantee program" ” as may be determined by the Security Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. SENIOR SUBORDINATED GUARANTEE

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "“eligible guarantor institution" ” (i.e., a bank, stockbroker, savings and loan association or credit union) meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Medallion Program ("“STAMP"”) or such other "“signature guarantee program" ” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. EXHIBIT A FORM OF FACE OF EXCHANGE SECURITY OR PRIVATE EXCHANGE SECURITY

Signature Guarantee. (Signature must be guaranteed) Note: Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Security Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Security Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Securities Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Securities Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "“eligible guarantor institution" ” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("“STAMP"”) or such other "“signature guarantee program" ” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. [FORM OF NOTATION ON NOTE RELATING TO GUARANTEE] GUARANTEE

Signature Guarantee. (7) --------------- (7) (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition addition, to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.) EXHIBIT B REMARKETING AGREEMENT

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") ----- or such other "signature guarantee program" as may be determined by the ----------------- Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.). EXHIBIT C --------- [FORM OF GUARANTEE] GUARANTEE

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the U.S. Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. Exhibit B ================================================================================ XTO ENERGY INC. and the Guarantors named herein ----------------------------

Signature Guarantee. (Signature must be guaranteed.) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.. EXHIBIT A to INDENTURE [FORM OF FACE OF EXCHANGE NOTES OR PRIVATE EXCHANGE NOTES] [*/] CUSIP No. $ ------------ --------

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements may include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" that is a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or other such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities and Exchange Act of 1934, as amended.

Signature Guarantee. (*Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" (i.e., a bank, stockbroker, savings and loan association or credit union) meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "“eligible guarantor institution" ” that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("“STAMP"”) or such other "“signature guarantee program" ” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) guaranteed Signature Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, Registrar which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) SIGNATURE GUARANTEE Signatures must be guaranteed by an "eligible guarantor institution" meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

Signature Guarantee. (Signature must be guaranteed) Signatures must be guaranteed by an "eligible guarantor institution," that is, a bank, stockbroker, savings and loan association or credit union meeting the requirements of the Registrar, which requirements include membership or participation in the Security Securities Transfer Agent Agents Medallion Program ("STAMP") or such other "signature guarantee program" as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.)