The forms below may also be used. Acknowledgments. In this article, we discuss how to write a letter with two signatures and provide an example letter for you to use as a reference.Download a proof of residency letter template for family members, notarized or non-notarized, tailored for legal use. The signer instead makes a mark (such as an "X") or other symbols on the document. Sign on the signature line in the Signature section. "Learn how to craft an effective character reference letter for court proceedings with our comprehensive guide. (Both members and managers will be listed on the Manager Structure Attachment.) The filing will be rejected if it is submitted without the attachment. 7. Florida and Nebraska require two witnesses who must have no interest in the document being notarized. Please contact us if you have had a legal name change or the name on your denial or suspension letter is incorrect. Verification of Signatures.