verification

noun

1. the act of verifying.
2. the state of being verified.
3. evidence that establishes or confirms the accuracy or truth of something: We could find no verification for his fantastic claims.
4. a formal assertion of the truth of something, as by oath or affidavit.
5. the process of research, examination, etc., required to prove or establish authenticity or validity.
6. Law. a short confirmatory affidavit at the end of a pleading or petition.

noun

1. establishment of the correctness of a theory, fact, etc
2. evidence that provides proof of an assertion, theory, etc
3. law
   1. (formerly) a short affidavit at the end of a pleading stating the pleader’s readiness to prove his assertions
   2. confirmatory evidence