Dear [Recipient's Name], I am writing to express my sincerest apologies for the oversight in not crediting your payment on time. I understand the inconvenience and frustration this may have caused you, and I take full responsibility for this error. First and foremost, I would like to assure you that this was not a deliberate act, but an unfortunate mistake on our part. We highly value your business and strive to provide excellent service to all our customers. Regrettably, due to an internal miscommunication, your payment was not properly credited to your account in a timely manner. We understand the importance of promptly acknowledging payments and updating our records accordingly. We have taken immediate steps to rectify this issue and have credited the outstanding payment to your account as of [date]. You should now see the accurate balance reflected upon reviewing your account statement. In addition to making the necessary adjustments, we have implemented stringent measures to prevent any future occurrences of such errors. We have conducted comprehensive training sessions for our personnel to ensure that the procedures for crediting payments are strictly adhered to. We acknowledge the significance of maintaining your trust in our organization, and we are committed to upholding the highest standards of professionalism in all aspects of our operations. It is sincerely regrettable that we have inconvenienced you in this way, and we understand that this incident may have caused you inconvenience or concerns. To compensate for any inconvenience caused, we would like to offer you [insert compensation details, such as a discount on future purchases, a complimentary service, etc.] as a gesture of goodwill. We hope that this gesture will demonstrate our commitment to resolving this matter and restoring your confidence in our company. If you have any further questions or concerns, please do not hesitate to contact our customer service department at [phone number] or [email address]. We value your feedback and would be more than happy to address any additional issues or queries you may have. Once again, please accept our sincere apologies for the oversight. We genuinely appreciate your understanding and patience in this matter and look forward to continuing our positive relationship with you. Yours sincerely, [Your Name] [Your Title] [Company Name] [Company Address]