Accounts Receivable All accounts receivable of the Acquired Companies that are reflected on the Balance Sheet or the Interim Balance Sheet or on the accounting records of the Acquired Companies as of the Closing Date (collectively, the "Accounts Receivable") represent or will represent valid obligations arising from sales actually made or services actually performed in the Ordinary Course of Business. Unless paid prior to the Closing Date, the Accounts Receivable are or will be as of the Closing Date current and collectible net of the respective reserves shown on the Balance Sheet or the Interim Balance Sheet or on the accounting records of the Acquired Companies as of the Closing Date (which reserves are adequate and calculated consistent with past practice and, in the case of the reserve as of the Closing Date, will not represent a greater percentage of the Accounts Receivable as of the Closing Date than the reserve reflected in the Interim Balance Sheet represented of the Accounts Receivable reflected therein and will not represent a material adverse change in the composition of such Accounts Receivable in terms of aging). Subject to such reserves, each of the Accounts Receivable either has been or will be collected in full, without any set-off, within ninety days after the day on which it first becomes due and payable. There is no contest, claim, or right of set-off, other than returns in the Ordinary Course of Business, under any Contract with any obligor of an Accounts Receivable relating to the amount or validity of such Accounts Receivable. Part 3.8 of the Disclosure Letter contains a complete and accurate list of all Accounts Receivable as of the date of the Interim Balance Sheet, which list sets forth the aging of such Accounts Receivable.