Dear [Company Name], I am writing to address an issue regarding a duplicate payment that was made to your organization. After reviewing my records, I discovered that I inadvertently made a duplicate payment for [Product/Service] on [Date]. The payment was made via [Payment Method], and the transaction ID is [Transaction ID]. I would like to request a prompt refund of the duplicate payment, amounting to [$XX.XX], as soon as possible. I understand that errors can occur, and I trust that your company will rectify this situation promptly. To ensure a smooth resolution, I have enclosed copies of the original payment receipt and the duplicate payment receipt for your reference. I kindly ask that you verify this duplication in your records and initiate the refund process immediately. Please address the refund payment to the following address: [Your Name] [Your Address] [City, State, ZIP Code] Additionally, I would appreciate if you could confirm the refund process and provide me with an estimated timeframe for when I can expect to receive the reimbursement. Should you require any further information or clarification, please do not hesitate to contact me at [Your Phone Number] or [Your Email Address]. I understand that mistakes can happen, and I appreciate your attention to this matter. I believe your prompt action will resolve this issue efficiently. Thank you for your cooperation, and I look forward to receiving the refund without delay. Sincerely, [Your Name]