Attest

Webster's Dictionary of the English Language

·noun Witness; testimony; attestation.

II. Attest ·vt To call to witness; to Invoke.

III. Attest ·vt To give proof of; to Manifest; as, the ruins of Palmyra attest its ancient magnificence.

IV. Attest ·vt To bear witness to; to Certify; to affirm to be true or genuine; as, to attest the truth of a writing, a copy of record.