Dear [Sender's Name], I hope this letter finds you well. I am writing to request the return of a specific document that I recently sent to your office. Due to the nature of the document and its confidentiality, it is of utmost importance that I receive it back at the earliest convenience. The document in question is [Provide details about the document: its title, purpose, and any reference numbers if applicable]. It was sent to your office on [date of sending] through [mention the mode of delivery, such as registered mail or courier service]. Unfortunately, I have just realized that the document requires my signature for it to be processed correctly. I sincerely apologize for any inconvenience this may have caused, as it was an oversight on my part. Therefore, I kindly request that you return the document to me as soon as possible so that I can provide the required signature and promptly resolve this matter. To facilitate a smooth return process, I have enclosed a pre-paid envelope along with this letter. I kindly request you to securely place the document inside the provided envelope and send it back to the following address: [Provide complete return address, including any department or specific recipient]. If there are any additional charges associated with the return of the document, please let me know in advance so that I can arrange for the required payment. I understand that this may cause some inconvenience, and I am willing to take full responsibility for any costs involved. I kindly request that you acknowledge the receipt of this letter and confirmation of returning the document to me. You can reach me at [provide contact details] or via email at [provide email address]. I appreciate your prompt attention to this matter and apologize for any inconvenience caused. Thank you for your understanding and cooperation. I look forward to receiving the document back soon. Sincerely, [Your Name] [Your Contact Information] [Your Address] [City, State, ZIP] [Date]