7 CFR 46.21: Returns, rejections, or credit memorandums on sales.

In the event of the rejection and return of any produce sold for or on behalf of another, on consignment, or on joint account, or of any necessary allowance or adjustment being made to the buyers thereof, a credit memorandum showing the buyer's name, sales ticket number, lot number, date of the granting of the allowance, and amount of the credit or adjustment, with reasons therefor, shall be made or a notation shall be made on the original sales ticket referring to the adjustment and showing where the credit memorandum is filed. The credit memorandum shall be on a regular form, in a ledger book, or on a sales ticket or invoice properly completed to show the facts and shall be approved by a duly authorized person. Credits granted shall be entered in the same records as the original sales tickets.