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.Discover how our refund letter to customer template can enhance satisfaction and loyalty, with professional tips for seamless communication. NOTICE OF FOOD STAMP OVERPAYMENT (DEMAND LETTER) (Timely and Adequate). NOTICE. We have identified the following overpayment and are in good faith voluntarily refunding all monies collected in error. The salary overpayment resulted because . Complaint Information. Please explain your complaint: Try to be brief, but be sure to tell WHAT happened, WHEN it happened and WHERE it happened. MEDI-CAL POTENTIAL OVERPAYMENT REPORTING WORKSHEET - PROPERTY.