CERTIFY

v. 1 confirm, attest (to), verify, testify (to), affirm, aver, asseverate, corroborate, substantiate, endorse, guarantee, warrant; swear (to), bear witness (to), vouchsafe, vouch (for) I will certify the accuracy of the report She certified that she was the owner of the car. 2 declare, classify, establish, confirm The magistrate certified the man insane