Dear [Recipient's Name], I hope this letter finds you well. I am writing to sincerely apologize for the error that occurred in our recent advertisement campaign, specifically in relation to the North Carolina area. We take great pride in ensuring the accuracy and quality of our advertisements, so it is with deep regret that I acknowledge the mistake made. Our team is fully aware of the importance of delivering reliable information to our valued customers, and we deeply apologize for any inconvenience, confusion, or disappointment this may have caused. Following a thorough investigation, we have identified that there was an unintentional error in the information provided in our advertisement pertaining to North Carolina. We understand how crucial it is to have accurate details, especially when it comes to location-specific information. Rest assured, we have taken immediate action to rectify the mistake and ensure such errors do not occur in the future. To express our sincerest apologies, we are offering a special discount of [X]% on any purchase made by customers in the North Carolina region. This discount will be applicable for [X] days from the date of this letter. We hope this gesture will demonstrate our commitment to rectifying our mistake and regaining your trust as a valued customer. Additionally, we have put stringent measures in place to ensure that our advertisement production process undergoes enhanced scrutiny to prevent any such errors. Our team is undergoing further training to reinforce the importance of accuracy and attention to detail in every aspect of our marketing efforts. We understand that your time is valuable, and we deeply regret any inconvenience caused as a result of the error. We want to assure you that we are doing everything in our power to make amends and prevent such mistakes from happening again. Once again, please accept our heartfelt apologies for any frustration or inconvenience you may have experienced. If you have any further questions or need clarification, please do not hesitate to contact our customer service team at [phone number] or via email at [email address]. Thank you for your understanding and continued support. We value your patronage and look forward to serving you with the highest level of accuracy and excellence in the future. Sincerely, [Your Name] [Your Position] [Company Name] [Company Address]