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.Follow the steps below to craft an effective signon letter and gather lots of signatures to help sway decisionmakers. All applications for new notary commissions, renewal applications, online authorizations, amendments and resignations must be filed electronically here. A Certificate of Title is one of the most notarized documents in the State of Ohio.