Dear [Client's Name], I hope this letter finds you well. We are writing to inform you that an overpayment has been made on your account. After carefully reviewing our records, it has come to our attention that there was an error in the billing process, resulting in an excess payment from your end. We apologize for any inconvenience this may have caused and assure you that we are committed to promptly resolving this matter. As per our company policy and ethical values, we are dedicated to maintaining transparency and fairness in all our financial transactions. At this time, we would like to formally request your cooperation in returning the overpaid amount of [Amount]. We kindly ask that you review your own records to confirm the excess payment made. Once you have verified the amount, we kindly request that you send a check payable to [Your Company Name] at your earliest convenience. As a valued client, we believe in open communication and fair resolutions. Therefore, should you have any questions or require any clarification regarding this matter, please do not hesitate to contact our dedicated customer service team at [Customer Service Contact Details]. They will be more than happy to assist you and provide any necessary documentation or information. It is important to emphasize that we sincerely value your continued business and aim to maintain a strong working relationship. We deeply appreciate your professionalism and cooperation in resolving this matter promptly. Rest assured that we will update our records accordingly and ensure that accurate billing practices are followed in the future to avoid any similar occurrences. Thank you in advance for your prompt attention to this matter. We look forward to your favorable response and the timely return of the overpayment. Your commitment to resolving this situation will help us maintain the trust and confidence we have established with your esteemed company. Warm regards, [Your Name] [Your Title] [Your Company Name] Keywords: New Hampshire, sample letter, return of overpayment, customer service, billing error, cooperation, excessive payment, ethical values, transparency, fair resolution, valuable client, open communication.