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.You have to tell your credit or debit card company about any error you're disputing within 60 days of when the first statement with the charge was sent to you. Discover how our refund letter to customer template can enhance satisfaction and loyalty, with professional tips for seamless communication. If you were overpaid, you will receive a written notice in the mail. 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! We have identified the following overpayment and are in good faith voluntarily refunding all monies collected in error. Use their full name and address. This letter provides a partial or full refund to a customer for a trip that was cancelled due to the unprecedented challenges facing the travel industry.