An affidavit of forgery is an official declaration that a fraudulent act was committed. It should be completed, notarized, and sent to notify institutions.This article and video will show Notaries to fill out each part of a notarial certificate, and common mistakes to avoid. Everything you need to know about notarizing affidavits. Learn what an affidavit is and how to notarize it. Do I fill the Affidavit of Identity out before going to a notary? No. A notary expects to witness your signature. You must complete two original copies of the affidavit before a Notary Public. An "Affidavit of Forgery" is a notarized, sworn statement, attesting that the signature appearing on it is indeed a forgery.