This brief but important letter notifies a customer that he or she has overpaid you. It can serve as a very good customer relations letter.Our document template is designed to make the process of writing an "Inform a Customer of an Overpayment" letter quick, easy, and stress-free. Providers have the option to submit a Request For Extended Repayment Schedule (ERS). A complete ERS request should be submitted immediately. INCOME STATEMENT DETAILS Only enter income on which Georgia tax was withheld. Enter income from W-2s, 1099s, and G2-As on Line 4.