Our document template is designed to make the process of writing an "Inform a Customer of an Overpayment" letter quick, easy, and stress-free. 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. If you need to inform a customer about an overpayment, you can follow a friendly and professional approach in your letter. Here's a sample template you can use. The salary overpayment resulted because . 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!