certify

(v) provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
- His high fever attested to his illness
- The buildings in Rome manifest a high level of architectural sophistication
- This decision demonstrates his sense of fairness
attest, evidence, manifest, demonstrate,
(v) guarantee payment on; of checks
(v) authorize officially
- I am licensed to practice law in this state
licence, license,
(v) guarantee as meeting a certain standard
- certified grade AAA meat
endorse, indorse,
(v) declare legally insane

attest evidence manifest demonstrate licence license endorse indorse

decertify derecognise derecognize