Use this sample letter. Send your letter so that it reaches the issuer within 60 days after the first bill with the error was sent to you.The objective of the Cash Handling process for credit cards is to ensure that all credit card transactions are received, validated, batched and reconciled. This chapter deals with state law provisions identifying, establishing, and collecting overpayments. All states have provisions addressing these matters. Have you gotten a letter or phone call from a debt collector? If you owe the debt, don't owe the debt, or don't know, you have rights and options. We inform people about the fact and amount of the overpayment, their right to appeal, and the options to repay or, in some cases, receive waivers for the debt.