[Your Name] [Your Address] [City, State, ZIP] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Address] [City, State, ZIP] Subject: Disputed Bill for [Service/Company Name] Account Dear [Recipient's Name], I hope this letter finds you well. I am writing to formally dispute a bill I recently received from [Service/Company Name] pertaining to my [specific service] account. I have carefully reviewed the charges and have noticed discrepancies that need immediate attention. Upon examining the bill, it came to my attention that there are several items listed for which I have not received satisfactory explanations. Firstly, the bill includes a charge of EX for [service/transaction]. However, I have never authorized nor received this particular service. I kindly request you to rectify this error promptly. Furthermore, the bill exhibits an additional charge of EX for [specific fee], which is not listed nor mentioned in the terms and conditions we initially agreed upon. I kindly seek clarification for the imposed fee or request its removal from the bill. To ensure a resolution to this matter, I have taken the liberty of gathering supporting documents, including copies of previous bills, our contract, and any relevant correspondence. I kindly request that you investigate these discrepancies thoroughly and provide me with a detailed account of each charge included in the bill. It is important to emphasize that while I dispute specific charges, I am fully prepared to pay for any legitimate charges I have incurred. I have been a loyal and satisfied customer of [Service/Company Name] for several years, and I hope that this issue can be resolved promptly, maintaining the trust and satisfaction I have had with your services. According to the Fair Credit Billing Act, I expect that you acknowledge receipt of this letter within 30 days and undertake a resolution within 60 days. Failure to address this issue within the specified timeframes may necessitate my further actions, including seeking legal advice and lodging a complaint with the appropriate regulatory bodies. Please provide a detailed response to my concerns regarding the disputed bill within two weeks from the receipt of this letter. You can reach me at the contact details provided above. I appreciate your prompt attention to this matter and your assistance in resolving this dispute. Thank you for your immediate action and cooperation in this matter. I look forward to your prompt response. Sincerely, [Your Name]