certifycer·ti·fy /ˈsɜːtəfaɪˈsɜːr-/ verb (past tensepst and past participlepp certified) [transitiveT]1to state that something is correct or suitable, especially after an official check or testEvery delivery must be certified for consistent quality.
The farm has not yet been certified organic.
2JOBto give an official paper to someone that states they have completed a course of training for a professionShe was certified as an accountant in 1996.