Verifier

ver·i·fy  (vr-f)

tr.v. ver·i·fied, ver·i·fy·ing, ver·i·fies

1. To prove the truth of by presentation of evidence or testimony; substantiate.

2. To determine or test the truth or accuracy of, as by comparison, investigation, or reference: experiments that verified the hypothesis. See Synonyms at confirm.

3. Law

a. To affirm formally or under oath.

b. To append a verification to (a pleading); conclude with a verification.

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[Middle English verifien, from Old French verifier, from Medieval Latin vrificre : Latin vrus, true; see wr-o- in Indo-European roots + Latin -ficre, -fy.]

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veri·fier n.

Thesaurus

Noun

1.

verifier - someone who vouches for another or for the correctness of a statement voucher admirer, booster, protagonist, supporter, champion, friend - a person who backs a politician or a team etc.; "all their supporters came out for the game"; "they are friends of the library"