a written document describing a set of facts and authorized by a notary public. The document often describes something that the notary public has done, or which has been done before him or her, in his or her official capacity.
Once a notarial act has been signed by the notary, the date of signature is deemed to be the date of the act.
any action that a notary public (=a person authorized by the state to conduct limited legal functions, such as authenticating signatures and certifying documents) is authorized to perform
A notarizing officer must execute a written certificate attesting to the performance of a notarial act.