Dear [Client], I hope this letter finds you in good health. I am writing to inform you that an overpayment has been identified in your account with our company. We greatly appreciate your business and take this opportunity to address this matter promptly. Upon reviewing our records, we have come to understand that an overpayment in the amount of [dollar amount] was made on [date]. This surplus arises as a result of [briefly explain the reason for overpayment, e.g., duplicate payment, invoice error, or miscalculation]. We sincerely apologize for any inconvenience or confusion this may have caused you. As per our policy and commitment to maintaining transparency and ethical business practices, we would like to promptly return this overpayment to you. Enclosed with this letter, you will find a check for the full amount of the overpayment. Please kindly deposit or cash the enclosed check at your earliest convenience. If you have any questions or concerns regarding this matter, please do not hesitate to contact our customer service department at [phone number] or via email at [email address]. Our dedicated team will be more than happy to assist you and provide further clarification. Once again, we apologize for any inconvenience this overpayment may have caused, and thank you for your understanding and cooperation. We value your continued support and look forward to serving you in the future. Sincerely, [Your Name] [Your Title/Position] [Your Company Name] [Your Contact Information] Keywords: West Virginia, sample letter, return of overpayment, overpayment to client, refund, duplicate payment, invoice error, miscalculation, ethical business practices, transparency, customer service.