Dear [Customer's Name], Subject: Apology for Accounting Errors and Past Due Notices I hope this letter finds you well. We, at [Your Company Name], would like to extend our sincerest apologies for the accounting errors and past due notices you have received. We deeply regret any inconvenience or frustration this may have caused you. First and foremost, we want to acknowledge that the errors and notices were completely unintentional. Our accounting department has recently undergone a transition, and regrettably, some mistakes were made during this transition period. We take full responsibility for these errors and are actively taking measures to rectify the situation promptly. To address these issues, we have identified the root causes of the accounting errors and implemented corrective actions to ensure these mistakes do not recur in the future. We have also reviewed our internal processes and systems to improve their efficiency and accuracy. In light of this situation, we want to assure you that we value your business and your satisfaction is of utmost importance to us. It is with great regret that we acknowledge the inconvenience and confusion caused by the past due notices. Please be assured that we have adjusted all relevant accounts accordingly to remove any undue penalties or charges resulting from the errors. We understand that it is our responsibility to maintain clear and open lines of communication with our valued customers. Going forward, we are committed to providing you with accurate and reliable accounting information. Our dedicated customer support team is available to answer any questions or concerns you may have, and we encourage you to contact them at [customer support contact details]. Once again, please accept our most sincere apology for the errors made and the past due notices you received. We recognize that we have faltered in our commitment to serving you with accuracy and efficiency. We assure you that we are actively working to regain your trust and confidence. Thank you for your understanding and patience throughout this process. We appreciate your continued support and value our ongoing business relationship. Should you require any further assistance, please do not hesitate to reach out to us. Wishing you the best and looking forward to restoring your trust in our company. Sincerely, [Your Name] [Your Position] [Your Company Name]