Certificate of Authentication Law and Legal Definition

Certificate of authentication is a certificate of authentication of a document or copy by officer of a court of record, or like official, who has custody of the document. It is issued by such officer to the effect that the officer taking an acknowledgment or proof by affidavit was, at the date thereof, such officer as he claimed to be, and authorized to take the acknowledgment or proof. Also, signature appended to the acknowledgment or proof is the genuine signature of the officer. It is also known as a county clerk's certificate.