You may either fill out pdf online or print blank form, print or type the requested information and mail it to: Manual Signatures,. This article and video will show Notaries to fill out each part of a notarial certificate, and common mistakes to avoid.Create a notarized letter with critical components, legal tips, and an example template. Maryland Notary instructor Elaine Wright Harris explains what to do when Notaries in her state encounter documents that do not include certificate wording. How to fill out the Authorization Letter for Notarization Request? Can you write a letter and have it notarized? Yes, you can fill out the details of a letter on your own and then contact a public notary to get it notarized. To be appointed as a notary public, an individual must: 1. Be at least 18 years old; 2. Can a Notary certify a birth certificate or other public document?