certificaten.[F. certificat, fr. LL. certificatus made certain, p. p. of certificare. See tify.]1. A written testimony to the truth of any fact; as, certificate of good behavior.()2. A written declaration legally authenticated.()Trial by certificate, a trial which the testimony of the person certifying is the only proper criterion of the point in dispute; as, when the issue is whether a person was absent in the army, this is tried by the certificate of the proper officer in writing, under his seal. Blackstone.()v. t.[See Certify.]()1. To verify or vouch for by certificate.()2. To furnish with a certificate; as, to certificate the captain of a vessel; a certificated teacher.()