certify

To confirm officially that someone or something meets a required standard.

• They certify organic farms.
• The blankets were certified as fireproof.
• Is she certified to teach this course?

How to use it: certify someone/something as something (The board certified her as a diving instructor.); be certified to do something (He is certified to inspect electrical equipment.)

Similar words: accredit, approve

Common phrases: certify a product, certify someone as, certify something organic

To state officially that something is true or correct.

• Please certify this copy.
• The doctor certified that he was unable to work.
• A witness must certify the signature as genuine.

How to use it: certify that + clause (The doctor certified that she was fit to travel.); certify something as something (The clerk certified the copy as genuine.)

Similar words: attest, confirm

Common phrases: certify a copy, certify that something, certify something true