NOTICE OF FOOD STAMP OVERPAYMENT (DEMAND LETTER) (Timely and Adequate). NOTICE. The salary overpayment resulted because .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. This memorandum serves as notification of an overpayment of wages that you received and the subsequent repayment that is your responsibility. Complaint Information. Please explain your complaint: Try to be brief, but be sure to tell WHAT happened, WHEN it happened and WHERE it happened. Overpayments. Information on overpayments and overpayment waivers. Other Assistance and Resources. Overpayment and Waiver Request Information.