[Your Name] [Your Address] [City, State, Zip] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Position] [Company Name] [Company Address] [City, State, Zip] Subject: Apology for not Crediting Payment Dear [Recipient's Name], I hope this letter finds you in good health and high spirits. I am writing to offer my sincere apologies for the oversight on my part regarding the payment executed for [specific product/service] on [payment date]. It has come to my attention that the payment was not credited to your account properly, which has caused undue inconvenience and frustration for you and your esteemed company. Upon discovering this unfortunate error, I immediately contacted our accounting department to investigate the matter thoroughly. After a detailed review of the records and transactions, it was revealed that an internal glitch led to the system failing to process the payment successfully. I understand the gravity of this mistake, and I take full responsibility for the oversight. Please allow me to assure you that we deeply value your business partnership and respect our commitment to prompt and accurate financial transactions. Rest assured, we have taken immediate action to rectify this situation. Our accounting team has initiated the necessary steps to credit the payment to your account immediately, and you will receive the confirmation with the updated account balance within [timeframe]. In addition to addressing the payment issue, I assure you that we are thoroughly investigating the root cause of this error to implement enhanced protocols and preventive measures. We are committed to preventing such occurrences in the future to maintain the trust and satisfaction of our valued clients. Furthermore, I would like to extend my personal apologies for any inconvenience this may have caused you and any undue stress it may have placed on your business operations. We deeply understand the impact of such errors and are taking steps to ensure they never happen again. To compensate for the inconvenience caused, we are offering a [specific compensation or discount] on your next purchase or service to demonstrate our commitment to making it right. We genuinely value your business and aim to maintain a long-standing and fruitful relationship with you and your esteemed organization. Once again, please accept my sincerest apologies for this oversight. I assure you that this incident is an exception to our usual standards, and we are committed to preventing its recurrence in the future. Should you wish to discuss this matter further or have any additional concerns, please do not hesitate to contact me directly at [phone number] or [email address]. Thank you for your understanding and patience in this matter. Your satisfaction and trust are of utmost importance to us, and we will continue to work diligently to regain your complete confidence in our services. Wishing you every success in your endeavors. Sincerely, [Your Name]