Subject: Request for Return of Late Payment and Denial of Discount — Account #[Account Number] [Your Name] [Your Address] [City, State, Zip Code] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Position] [Company Name] [Company Address] [City, State, Zip Code] Dear [Recipient's Name], I hope this letter finds you well. I am writing to address an issue concerning a late payment and the denial of a previously agreed discount on my recent invoice for the services/products received from your esteemed company. As a loyal customer and supporter of your business, I have always valued the professional relationship we have maintained over the years. I have made regular and prompt payments in the past, ensuring that both parties benefit from our business collaboration. However, I was disheartened to discover that my recent payment for the invoice #[Invoice Number] was received by your company after the due date. I immediately contacted your accounting department to rectify the situation, but unfortunately, the late fee was still applied to my outstanding balance. Based on our previous correspondence dated [Correspondence Date], it was agreed that I would be entitled to a [specified discount percentage] discount on this invoice's total amount. To my surprise, upon reviewing the invoice, I noticed that the discount was not applied despite meeting all the eligibility criteria mentioned. Therefore, I kindly request the reversal of the late payment fee and the application of the promised discount. I believe this is a fair request, considering my longstanding commitment to timely payments and the terms agreed upon beforehand. In order to ensure prompt resolution, I have enclosed a copy of the invoice #[Invoice Number] as well as the proof of payment for your reference. I kindly ask that you review these documents and adjust my account accordingly. If there is any additional information required or if you have any concerns regarding this matter, please feel free to contact me at your earliest convenience. I value our business relationship and trust that this issue can be resolved amicably. I appreciate your attention to this matter and look forward to a favorable response within [specified time frame] days. Thank you for your prompt consideration. Sincerely, [Your Name]