Once you get to a notary public with the affidavit of identity, they will ask you to provide proof of identity issued by the federal or state government such as your driver's license or birth certificate.
Review the document for authenticity, absence of signs of forgery or alteration, and legitimacy. They will also confirm that you and the person pictured in the document are the same individuals.
After reviewing your identification document, they will witness you signing the document by signing and stamping it themselves.