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Synonyms for certify

verb

  1. To give assurance

    guarantee, accredit, vouch for, endorse; see approve 1, guarantee 1.

  2. To state formally

    attest, verify, swear, confirm; see declare 1, testify 2. See syn. study at approve.

See certify in Webster's New World Roget's A-Z Thesaurus II

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