[Your Name] [Your Address] [City, State, ZIP] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Position] [Company Name] [Company Address] [City, State, ZIP] Subject: Request for Refund Due to Duplicate Payment Dear [Recipient's Name], I hope this letter finds you well. I am writing to bring to your attention a payment error that occurred recently within my account, resulting in a duplicate payment for the same service rendered by your esteemed organization, [Company Name]. On [Date of Duplicate Payment], I made a payment of [Payment Amount] through [Payment Method] for [Service/Product Purchased]. However, due to an oversight, another payment of the same amount was inadvertently processed on [Second Payment Date], resulting in an overpayment on my part. To verify this duplicate payment, I have enclosed copies of both payment receipts, highlighting the identical payment details. My diligent review of my financial statements brought this error to light, and I immediately realized the oversight and took prompt action to resolve the issue. I kindly request your assistance in rectifying this error and refunding the duplicate payment amount of [Duplicate Payment Amount] back to my original payment method at your earliest convenience. I understand that mistakes happen, and I trust that your organization will handle this matter promptly and with the highest level of customer service. To ensure a swift resolution, I kindly request that you acknowledge receipt of this letter within [number of days, typically 10], and provide me with a timeframe for the processing of the refund. Please be aware that any delays in resolving this matter may result in my seeking further action to recover the duplicate payment. I would like to express my appreciation for your attention to this matter and your understanding. I have always valued my dealings with [Company Name], and I trust that this situation will be handled with the utmost professionalism and efficiency. Should you require any additional information or documentation, please do not hesitate to contact me by phone at [Phone Number] or via email at [Email Address]. I would be happy to provide any necessary details promptly to facilitate the refund process. Thank you in advance for your immediate attention to this matter. I look forward to your prompt response and the successful resolution of this issue. Yours sincerely, [Your Name]