attester
at·tes·ter
noun
1.
someone who affirms or vouches for the correctness or truth or genuineness of something
Origin
From attest + -er.
Related words
Word family
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.