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. The salary overpayment resulted because . To designate part of your overpayment to the N.C. Education. Endowment Fund, see the instructions for Line 31 on Page 15. This memorandum serves as notification of an overpayment of wages that you received and the subsequent repayment that is your responsibility. How do I apply for Child Support Services? You can complete the application at your local CSS office or apply online. You will be asked to provide your credit card number and its expiration date.