When you have a document notarized, the notary authenticates your signature on that document. That’s why the person signing the document has to appear and sign in the presence of the notary. Notarization says that you affirm you’re telling the truth, that you were identified by the notary, and that’s really your signature on the document; not someone pretending to be you.
You must prove your identity with an acceptable form of identification: that is, a state driver’s license; a state ID card; a U.S. passport; or a U.S. military ID card.
Your unexpired ID must identify you as your signature will appear on the document. If using a maiden name, middle initial or suffix (Jr., III, etc.), that part of your name must be on your ID. Birth certificates, marriage licenses, court documents, and credit cards are not acceptable forms of identification.
The notary does not have to watch you fill out forms or write your statements. You can do that prior to appearing before the notary; however, you must wait to sign and date the document in the presence of the notary.