Dear [Customer's Name], Subject: Apology for Accounting Errors and Past Due Notices We hope this letter finds you well. We are writing to sincerely apologize for the recent accounting errors which caused incorrect past due notices to be sent to you. We deeply regret any inconvenience or confusion this may have caused and assure you that we are taking immediate action to rectify the situation. At [Company Name], we pride ourselves on providing accurate and reliable financial services to our valued customers like yourself. Unfortunately, due to unforeseen circumstances, a series of oversights occurred within our accounting department. These errors led to inaccurate past due notices being generated and sent out to our clients, including you. We understand the frustration and concern this may have caused you, and we want to assure you that we are working diligently to rectify the situation. Our team is conducting a thorough review of all accounts, cross-referencing transactions, and ensuring that all outstanding balances are accurately reflected. We are also implementing additional quality control measures to prevent similar errors from occurring in the future. Rest assured that we have identified the root causes of these errors and are committed to resolving them swiftly. We pledge to provide you with updated and accurate account statements within the next [specified timeframe]. If you have already made any payments towards the erroneous past due notice, please rest assured that we will properly credit them to your account. Furthermore, as a gesture of apology, we would like to offer you [appropriate compensation or discount such as a credit towards future purchases or a waived fee]. It is our sincerest intention to regain your trust and loyalty by rectifying the situation to your satisfaction. Please accept our most profound apologies once again for any inconvenience caused. Our commitment to providing excellent service remains unwavering, and we highly value your business. If you have any questions or concerns, please do not hesitate to contact our customer service department at [customer service phone number or email address]. Thank you for your understanding and patience. We look forward to serving you diligently in the future. Sincerely, [Your Name] [Your Title/Occupation] [Company Name]