WordNet
certificatory
adj. serving to certify or endorse authoritatively
Usage examples of "certificatory".
From a worn leather snap-purse in his vest pocket he pinched out a much-folded parchment, of a kind familiar: under the usual certificatory formulations, Harold Bray's signature and a penned subscription: "Founder helps those who help themselves.
He fumbles with one hand inside his shirt, for he wears no coat, and out of that mysterious receptacle he presently produces his certificatory Carte de Civisme--his identity card, what?