attestant

Noun attestant has 2 senses

• attestant(n = noun.person) attestator, attestor, witness - (law) a person who attests to the genuineness of a document or signature by adding their own signature;
is a kind of signatory, signer
Derived form verb attest₃

• attestant(n = noun.person) attester - someone who affirms or vouches for the correctness or truth or genuineness of something;
is a kind of informant, witness, witnesser
Derived form verb attest₂