[Your Name] [Your Address] [City, State, ZIP] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Address] [City, State, ZIP] Subject: Return of Check Without Signature — Account Number: [Account Number] Dear [Recipient's Name], I am writing to inform you that I recently received a check from your esteemed organization bearing check number [Check Number] in the amount of [Check Amount]. However, upon careful examination, I noticed that the check did not bear the required signature, rendering it invalid and non-negotiable. Therefore, I kindly request that you rectify this issue by issuing a new check with the appropriate signature. To ensure a smooth resolution, I have enclosed the original check for your reference and further verification. Moreover, I will also require the amended check to be sent to the following address: [Your Updated Address] before [Specific Date, preferably within 14 days], to avoid any further inconvenience or delays. In addition, kindly provide confirmation once the new check is sent so that I can anticipate its arrival and take the necessary actions to process it accordingly. It is important to note that I have not cashed or deposited the check without a signature, understanding its invalidity, and I appreciate your prompt attention to this matter. Please be advised that failure to replace the check within the designated timeframe may result in additional costs or necessary legal actions, as per the applicable regulations and legal recourse. Should you require any further information regarding this issue, please do not hesitate to contact me at [Your Phone Number] or [Your Email Address]. I am readily available to assist and resolve any concerns. Thank you for your immediate attention to this matter, and I look forward to receiving the new check promptly. Yours sincerely, [Your Name] [Your Account Number]