Dear [Customer's Name], We hope this letter finds you in good health. We are writing to address a recent accounting error and apologize for any inconvenience it may have caused. It has come to our attention that there has been a mistake in our accounting records regarding your outstanding balance. Firstly, we would like to express our sincere apologies for the confusion and frustration this may have caused you. We deeply regret the error and assure you that we are taking immediate measures to rectify the situation. Upon meticulous review of our records, we discovered that there was an oversight in updating your account balance, resulting in the issuance of past due notices in error. Please rest assured that this was an isolated incident, and we are taking steps to ensure that such errors do not occur in the future. To rectify the mistake, we have promptly updated your account balance to accurately reflect the correct outstanding amount. To avoid any further inconvenience, we have reissued the correct statements and removed any late fees or penalties that may have been added due to this mistake. We understand the frustration and inconvenience that this may have caused you, and we sincerely apologize for any stress it may have caused. We value your business and will do everything possible to regain your trust and restore your confidence in us. In light of this error, we assure you that we have implemented additional checks and controls in our accounting processes to prevent any similar errors from occurring again. We are committed to providing you with accurate and efficient service moving forward. Again, we apologize for any inconvenience this may have caused and assure you that we are taking immediate steps to address this matter. We value your business and appreciate your understanding. If you have any further questions or concerns, please do not hesitate to reach out to our dedicated customer service team at [customer service contact details]. Thank you for your patience and understanding. Sincerely, [Your Name] [Your Title] [Company Name]