An officer taking and certifying an acknowledgment or proof of an instrument for record must authenticate the officer's certificate by affixing thereto:
A judge or clerk of a court of record must authenticate that officer's certificate by affixing thereto the seal of the judge's or clerk's court. A mayor of a city must authenticate that officer's certificate by affixing thereto the seal of the mayor's city.
N.D.C.C. § 47-19-32