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. We have identified the following overpayment and are in good faith voluntarily refunding all monies collected in error. In this article, we'll provide tips on how to handle refund request letters and 7 sample templates you can use to get started today! This model letter as a legally approved form for a client to use when informing an employee about correcting a wage overpayment. The salary overpayment resulted because . Overpayment Refund​​ Please accept our sincerest apologies for any inconvenience this may have caused.