Subject: Apology for Accounting Errors and Late Payment Notices — [Your Company Name] Dear [Customer's Name], We sincerely apologize for the accounting errors that occurred regarding your recent invoices and the subsequent issuance of past due notices. At [Your Company Name], we take full responsibility for this oversight and are committed to rectifying the situation as promptly as possible. In our dedication to providing accurate and reliable accounting services, we understand that any errors or delays in your billing process can cause inconvenience and frustration. Please accept our sincerest apologies for the inconvenience this may have caused you. Upon investigating and rectifying the issue, we discovered that the errors were caused by a temporary technical glitch in our accounting system, which resulted in the incorrect billing and notification of past due payments. Rest assured, we have already taken immediate action to address the glitch and have implemented necessary measures to prevent any recurrence in the future. We deeply value your business and the trust you have placed in us. We understand that this situation may have created confusion or concern, but we assure you that your account has been updated, and the corrected amount due is [provide the accurate amount]. To demonstrate our commitment to resolving this matter, we have elected to waive any late fees or penalties that may have been accrued due to the errors. Our team has closely reviewed your account, and we have already updated it with the correct information. Please note that your future invoices will reflect the accurate billing details. We genuinely appreciate your patience and understanding throughout this process. Should you have any questions or require further assistance, please do not hesitate to contact our dedicated Customer Support team at [customer support contact details]. We will be delighted to promptly address any concerns and assist you in any way we can. Once again, we sincerely apologize for any inconvenience this may have caused. Your satisfaction is our top priority, and we deeply value your continued patronage. We remain committed to providing you with exceptional service and look forward to serving you better in the future. Thank you for your understanding. Warm regards, [Your Name] [Your Position] [Your Company Name] [Your Contact Information] Different Types of Colorado Sample Letters for Apology for Accounting Errors and Past Due Notices: 1. Colorado Sample Letter for Apology for Accounting Errors and Late Payment Notices — Corporate Clients 2. Colorado Sample Letter for Apology for Accounting Mistakes and Overdue Notices — Small Business Owners 3. Colorado Sample Letter for Apology for Accounting Inaccuracies and Outstanding Payment Letters — Individual Customers 4. Colorado Sample Letter for Apology for Accounting Errors and Final Demand for Payment — Legal and Formal Tone.