Subject: Request for Refund — Duplicate Payment [Your Name] [Your Address] [City, State, ZIP Code] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Position] [Company/Organization Name] [Address] [City, State, ZIP Code] Dear [Recipient's Name], I am writing to bring to your attention a payment discrepancy that occurred recently. It has come to my notice that I have made a duplicate payment for [service/product] to [Company/Organization Name] on [payment date]. I apologize for any inconvenience caused by this oversight. I have attached the relevant documentation as proof of the duplicate payment, including the payment receipt and bank statement, highlighting both transactions. The duplicated payment amount was [dollar amount]. The payment was made through [payment method], and the transaction ID/reference number for both payments are as follows: Payment 1: Payment Date: [Date] Transaction ID: [Transaction ID] Payment 2: Payment Date: [Date] Transaction ID: [Transaction ID] I kindly request that you investigate this matter and process a refund for the duplicate payment as soon as possible. I understand that errors can occur occasionally, and I appreciate your prompt attention to this matter. If necessary, please contact me at [phone number] or [email address] for any additional information or clarification required. I hope we can resolve this issue promptly and amicably. I trust your commitment to customer satisfaction and expect a favorable resolution in this matter. Furthermore, I would like to thank you in advance for your attention to this request. Furthermore, I look forward to receiving a written confirmation of the refund processing and the expected time frame for the reimbursement. Thank you for your prompt assistance. Yours sincerely, [Your Name] Additional Types of San Diego California Sample Letters for Refund for Duplicate Payment: 1. San Diego California Sample Letter for Refund of Duplicate Payment — Retail Stores 2. San Diego California Sample Letter for Refund of Duplicate Payment — Utility Bills 3. San Diego California Sample Letter for Refund of Duplicate Payment — Insurance Premiums 4. San Diego California Sample Letter for Refund of Duplicate Payment — Subscription Services 5. San Diego California Sample Letter for Refund of Duplicate Payment — Credit Card Charges 6. San Diego California Sample Letter for Refund of Duplicate Payment — Online Purchases These are just a few examples of the different types of letters that can be written for requesting refunds for duplicate payments in various scenarios. The overall structure and content of the letter would remain similar, with slight modifications to cater to the specific circumstances.