A notarization is generally an assurance made by a Notary Public that a document's signature is genuine, that the signer acted without duress, and that the signer intended the terms of the document to be in full force and effect.

In all cases, all signer and any required witness(s) must be present for the notarization.  You are required to bring acceptable ID as mandated by your state along with all pages of the document being notarized.