456-B:3 Notarial Acts in This State.
III. The signature, official seal or the legible imprint of an official rubber stamp stating the name of the notary, and the words "notary public, New Hampshire" and the expiration date of the notary public's commission of a person performing a notarial act or for a justice of the peace the name of the justice and the expiration date of his or her commission typed, printed, or stamped on the document are prima facie evidence that the signature is genuine and that the person holds the designated title.

RECORDS
Although New Hampshire law does not require notaries to keep a journal of their notarial acts, it is recommended by the National Notary Association that you do so.