Subject: Request for Refund of Duplicate Payment — Houston, Texas [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] Dear [Recipient's Name], I hope this letter finds you well. I am writing to bring to your attention an error in payment made to your esteemed organization. On [Date of Payment], I mistakenly made a duplicate payment for [Product/Service Name]. I would appreciate your kind assistance in processing a refund for the duplicate payment. Enclosed with this letter, please find the following supporting documents to validate my claim: 1. Copy of the original payment receipt 2. Copy of the duplicate payment receipt Upon careful review of my financial records, I discovered that the duplicate payment in the amount of [Duplicate Payment Amount] was made via [Payment Method, e.g., credit card or bank transfer]. I apologize for the oversight on my part and kindly ask for your cooperation in issuing a prompt refund. I kindly request that the duplicate payment amount be credited back to my original payment method as soon as possible. It is important to highlight that this accidental duplicate payment has caused financial inconvenience to my personal finances, and I trust your organization will process this refund with urgency. For your convenience, I have provided my contact information above. Should you require any further details or documents to process this refund, please do not hesitate to reach out to me. I believe in resolving this matter amicably, and I sincerely hope to receive a positive response within [mention a reasonable timeframe, e.g., 14 days]. Thank you for your immediate attention to this matter. I look forward to a swift resolution and appreciate your cooperation. Yours sincerely, [Your Name]