[Your Name] [Your Address] [City, State, ZIP Code] [Email Address] [Phone Number] [Date] [Client's Name] [Client's Address] [City, State, ZIP Code] Subject: Return of Overpayment — [Client's Name] Dear [Client's Name], I hope this letter finds you well. I am writing to address an error that occurred during the billing process for the services provided by our company. It has come to our attention that you have inadvertently made an overpayment for the services rendered. We sincerely apologize for any inconvenience caused and would like to rectify this situation promptly. After carefully reviewing our records and your account statement, it has been determined that an excess payment of [Amount] was made. This overpayment occurred due to a billing error on our end, and we take full responsibility for the oversight. Therefore, we are issuing a refund for the surplus amount. In accordance with the standard procedures of our company, we have enclosed a check for the overpaid amount. The enclosed check is made payable to [Client's Name] for the sum of [Overpaid Amount]. Please note that this refund includes any applicable taxes and fees, and it will be drawn from our company account at [Bank Name]. We kindly request you to deposit or cash the enclosed check at your earliest convenience. Should there be any issues with the check or if you have any questions regarding the refund, please do not hesitate to contact our customer service department at [Customer Service Phone Number] or via email at [Customer Service Email Address]. Our dedicated team will be more than happy to assist you. We deeply value your business and aim to maintain the highest level of satisfaction for our clients. We sincerely apologize for any inconvenience caused by this error and appreciate your understanding and cooperation throughout this process. If there is anything else we can assist you with, please do not hesitate to let us know. Thank you for your attention to this matter, and we look forward to your continued partnership with our company. Yours sincerely, [Your Name] [Your Title/Position] [Company Name]