[Your Name] [Your Address] [City, State, ZIP Code] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Address] [City, State, ZIP Code] Subject: Request for Refund — Duplicate Payment Dear [Recipient's Name], I hope this letter finds you in good health and high spirits. I am writing to bring to your attention a payment discrepancy that has occurred recently. I have identified an instance of duplicate payment from [Payment Method] for the invoice number [Invoice Number] dated [Invoice Date]. Therefore, I kindly request a refund for the excess amount paid. I have enclosed copies of all relevant documents, including the proof of payment and the duplicate payment transaction details, for your reference. Please find them attached to this letter. Detailing the transaction, on [Payment Date], a payment of [Total Amount Paid] was made towards the aforementioned invoice. However, due to an unforeseen technical glitch, an identical payment was inadvertently processed on [Duplicate Payment Date], leading to an overpayment of [Overpaid Amount]. As a valued customer of [Company/Organization Name], I trust you will expedite the refund process and credit the excess payment back to my [Payment Method] account promptly. I request your kind cooperation in resolving this matter and ensuring that the refund is processed within [Specify Timeframe, e.g., two weeks] from the date of this letter. In case any additional information or actions are needed from my end, please do not hesitate to contact me at [Phone Number] or via email at [Email Address]. I am more than willing to provide any further assistance or documentation necessary to expedite the resolution process. I sincerely appreciate your attention to this matter and your swift action in making the refund. Furthermore, I highly value the services and products provided by [Company/Organization Name] and believe in its commitment to customer satisfaction. Furthermore, I trust that this isolated incident will not affect our positive business relationship. Thank you for your immediate attention to this matter. I look forward to receiving a prompt resolution and a written confirmation of the refund initiated. Yours sincerely, [Your Name]