Other Words for Certify
Certify as a Verb has these synonyms:
confirm, attest (to), verify, testify (to), affirm, aver, asseverate, corroborate, substantiate, endorse, guarantee, warrant, swear (to), bear witness (to), vouchsafe, vouch (for)
Example: I will certify the accuracy of the report. She certified that she was the owner of the car.
Example: The magistrate certified the man insane.