Third-person singular simple present indicative form of authenticate.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "authenticates" in a sentence
"One of my customers gave me a review on Google Local, which I'll also try to encourage as it maybe "authenticates" the testimony - don't know if getting Google reviews also helps with prominence within the Local listings or with rankings?"
"NCR, based in Duluth, Ga., has introduced an ATM in Brazil that authenticates customers by identifying the vein patterns in their palm."
"At least it, like, totally authenticates his Liddell costume?"