Attestation

[Sarah]

The act of attesting; testimony; witness; a solemn or officialdeclaration, verbal or written, in support of a fact; evidence. Thetruth appears from the attestation of witnesses, or of the properofficer. The subscription of a name to a writing as a witness, is anattestation.

[Dave Paprocki]

An act or evidence of showing that something is true

[Sonia]

a formal statement that you make and officially say is true

[Raeanne Dimick]

Evidence or proof of something.