attestant
1. [ noun ] someone who affirms or vouches for the correctness or truth or genuineness of something
Synonyms: attester
Related terms: witness attest
2. [ noun ] (law) a person who attests to the genuineness of a document or signature by adding their own signature
Synonyms: witness attestor attestator
Related terms: signer law
Similar spelling:   attest
  attestator
  attestor
  attester
  attested
  attestation
  at_the_start
  atheist
  attested_to
  atheistic