Subject: Request for Return of Late Payment and Denial of Discount — [Your Account/Invoice Number] Dear [Recipient's Name], I hope this letter finds you in good health. I am writing to discuss a matter pertaining to the late payment of my recent invoice [invoice number] and the subsequent denial of the agreed-upon discount. As a valued customer of [Your Company Name], I believe this issue can be resolved amicably through prompt attention and communication. Firstly, I want to apologize for the delay in payment. Due to unforeseen circumstances, there was a slight oversight on my part, resulting in the payment being made after the designated due date. However, I assure you that this incident is an isolated case and does not reflect my usual promptness in settling financial obligations. Upon reviewing the situation, I realized that the payment was made a mere [number of days] later than the agreed-upon due date, which is within the acceptable tolerance levels outlined in our [contract/agreement]. Therefore, I firmly believe that I am entitled to the discount that was previously agreed upon for timely payments. I kindly request your reconsideration of the denial and the application of the discount to the outstanding balance. In my experience dealing with your esteemed organization, I have consistently maintained a good payment record. I genuinely value the professional relationship we have built, and I am confident that we can reach a fair resolution regarding this matter. As a sign of goodwill, I have already made the necessary payment to settle the outstanding balance according to the original invoice amount, taking immediate responsibility for the delay in payment. I kindly request your prompt attention to this matter, hoping that you recognize my loyalty as a longstanding customer. If you require additional information or documentation to support my request, please do not hesitate to contact me at [your contact number] or via email at [your email address]. I am more than willing to provide any necessary details to facilitate a speedy resolution. Thank you for your understanding and cooperation. I trust that you will find a fair solution to this predicament that ensures mutual benefit and sustains our ongoing business relationship. Looking forward to your positive response soon. Yours sincerely, [Your Name] [Your Company Name] [Contact Information]