What is the meaning of Attestation?

A thing that serves to bear witness, confirm, or authenticate; validation, verification, documentation.

A confirmation or authentication.

The process, performed by accountants or auditors, of providing independent opinion on published financial and other business records of an enterprise, public agency, or other organization.

An appearance in print or otherwise recorded on a permanent medium.

certificate

testimonial

attestation

statement

declaration

affidavit

Source: wiktionary.org