Washington Sample Letter for Refund for Duplicate Payment: Dear [Recipient's Name], I am writing to bring to your attention a billing issue that has occurred with my recent payment. On [date], I made a payment to your company in the amount of [Payment Amount] for [Reason for Payment]. However, upon reviewing my records, I have discovered that this payment was made twice, resulting in an accidental duplicate payment. I kindly request your immediate attention to rectify this matter and process a refund for the duplicate payment amount. Enclosed with this letter are copies of the relevant payment receipts, highlighting the duplicate payment for your reference and easy identification. I understand that mistakes can occur, and I hope that you will promptly address this error to ensure a favorable resolution. I have been a loyal customer of your company for [duration] and have always valued the high level of service and professionalism you provide. Furthermore, I trust that you will handle this matter with the same level of dedication and efficiency. To expedite the refund process, I would appreciate it if you could reimburse the duplicate payment amount to the original payment method used. If this proves to be inconvenient or if you require any additional information, please do not hesitate to contact me at [Your Phone Number] or [Your Email Address]. I would be more than willing to assist you in any way necessary. I expect to receive confirmation of the refund process within [timeframe]. Failure to address this issue promptly may result in taking further action, which I hope will not be necessary. Thank you for your immediate attention to this matter, and I look forward to resolving this issue satisfactorily. I trust that your company will rectify this error in a timely manner, reinforcing the excellent customer service for which you are known. Yours sincerely, [Your Name] [Your Address] [City, State, ZIP] [Email Address] [Phone Number] Alternative versions/types of Washington Sample Letter for Refund for Duplicate Payment may include: 1. Washington State Sample Letter for Refund for Duplicate Credit Card Payment 2. Washington Department of Revenue Sample Letter for Refund for Duplicate Tax Payment 3. Washington Health Insurance Exchange Sample Letter for Refund for Duplicate Premium Payment 4. Washington State University Sample Letter for Refund for Duplicate Tuition Payment 5. Washington Utilities and Transportation Commission Sample Letter for Refund for Duplicate Utility Payment.