Dear [Name], I hope this letter finds you well. I am writing to follow up on an issue regarding a duplicate order that I recently placed. On [date], I placed an order for [product/service] through your website/phone/mail. However, to my dismay, I received two identical orders instead of one. As a loyal customer, I believe this mix-up was unintentional, and I kindly request your assistance in resolving this matter promptly. To provide better clarity on the situation, I have enclosed copies of the order confirmation and invoice. The duplicate order reference numbers are [order number 1] and [order number 2]. These orders were placed under my name and billing/shipping address, which are as follows: Name: [Your Name] Billing Address: [Your Billing Address] Shipping Address: [Your Shipping Address] I understand that errors can occur, and I am confident that your team will rectify this situation in a timely manner. Therefore, I kindly request the following actions to be taken: 1. Cancelling the duplicate order: It would be greatly appreciated if you could cancel [order number 2] and ensure that I am only charged for the original order ([order number 1]). 2. Refund and/or credit back: I kindly request that the amount paid for the duplicate order is refunded to the original payment method used for the purchase. Alternatively, if feasible, a credit to my account or a voucher for future purchases would also be acceptable. 3. Confirmation and feedback: Once the resolution has been successfully processed, I kindly request a written confirmation detailing the cancellation and refund/credit back actions taken. Additionally, I encourage you to provide feedback on steps taken to avoid such duplication errors in the future. Please take into consideration that resolving this matter promptly would greatly improve my satisfaction as a customer. I have always admired the quality and professionalism of your products/services, and I believe in your commitment to excellent customer service. I would like to thank you in advance for your prompt attention to this matter. Should you have any further questions or require any additional information, please do not hesitate to contact me at [your contact information]. I am available at your earliest convenience. Looking forward to hearing from you soon and to the successful resolution of this issue. Warm regards, [Your Name]