[Your Name] [Your Address] [City, State, ZIP Code] [Email Address] [Phone Number] [Date] [Recipient's Name] [Recipient's Address] [City, State, ZIP Code] Subject: Return of Check — Missing Signature Dear [Recipient's Name], I am writing to inform you about a discrepancy with the check [Check Number] that I received from your esteemed organization. Upon close inspection, I noticed that the check lacks a valid signature, rendering it invalid for deposit or any other financial transactions. I have enclosed the original check in question with this letter. The check was issued on [Date] and amounts to $[Amount]. The remittance advice accompanying the check indicates that it is intended for [Purpose/Reason]. While I greatly appreciate your promptness in sending the payment, the missing signature raises concerns about its authenticity and bank compliance requirements. To rectify this issue, I kindly request you to review the enclosed check and ensure that it is signed properly by an authorized signatory. Additionally, kindly verify that all other details, such as payee, date, and amount, remain accurate to prevent any further complications. Please acknowledge receipt of this letter within [number of days] business days and provide me with an update regarding the resolution of this matter. You can reach me at the contact information provided above or via email at [your email address]. I would appreciate your utmost attention to this matter to avoid any delays in processing the payment. In the event that the check cannot be signed due to any specific reason, please provide me with an alternative solution, such as issuing a replacement check or arranging for a direct electronic fund transfer (EFT). Your assistance in resolving this issue promptly will be greatly appreciated. Thank you for your attention to this matter, and I look forward to receiving a speedy resolution. Should you require any further information or have any questions, please do not hesitate to contact me. Yours sincerely, [Your Name]