Authenticate and Certify

Authenticate

Authenticate verb - To declare (something) to be true or genuine.
Usage example: a jeweler authenticated the diamond as real

Certify is a synonym for authenticate in verify topic. In some cases you can use "Certify" instead a verb "Authenticate", when it comes to topics like genuine. popular alternative

Certify

Certify verb - To declare (something) to be true or genuine.
Usage example: experts certified the letter as indeed having been written by Abraham Lincoln

Authenticate is a synonym for certify in verify topic. You can use "Authenticate" instead a verb "Certify", if it concerns topics such as confirm, declare as true. popular alternative

Common collocations

documents authenticate documents certify documents
Cite this Source
Certify and Authenticate. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/authenticate/certify
Authenticate & Certify. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/authenticate/certify>.
Certify or Authenticate. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/authenticate/certify.
Google Ngram Viewer shows how "authenticate" and "certify" have occurred on timeline