Dear [Client's Name], We hope this letter reaches you in good health and high spirits. We are writing to inform you of a recent discovery regarding a financial transaction between us. It has come to our attention that there has been an accidental overpayment on your part, and we wish to rectify this error promptly. After thorough review of our records, we noticed that an excess payment of [amount] was unintentionally made by you on [date] for the [product/service] you recently purchased. We deeply apologize for any inconvenience caused by this mistake and assure you that we are committed to resolving it swiftly. As a responsible and ethical business entity, we believe in maintaining transparency and adhering to the highest professional standards. Consequently, we would like to return the overpayment immediately. We kindly request your assistance in helping us accomplish this by either providing us with your preferred mode of reimbursement or by allowing us to apply the excess amount towards any future purchases you may wish to make with our company. To initiate the return process, please choose one of the following options: 1. Refund: If you desire a full refund of the overpaid amount, please reach out to our dedicated customer service department at [contact details]. Our team will guide you through the necessary steps and ensure a seamless refund process within [number of business days] from the acknowledgment of your request. 2. Credit toward future purchases: If you prefer to utilize the overpayment as a credit for your next transaction with us, kindly inform us by responding to this letter or contacting our customer service department at [contact details]. We will happily keep a record of the excess amount and apply it to any future purchases you make with our company, based on your instructions. Please be assured that regardless of the option you choose, we will handle the return process efficiently and with utmost care. We understand the value of timely and accurate transactions, and our team is committed to resolving this matter to your full satisfaction. Once again, we sincerely apologize for any inconvenience caused by this unintentional overpayment. We value your association with our company and appreciate your understanding in this matter. Should you have any further questions or concerns, please do not hesitate to contact us. We remain at your service and look forward to resolving this issue promptly. Yours sincerely, [Your Name] [Your Position] [Company Name] [Company Address] [City, State, ZIP] [Contact Information]