Among his other credentials, Thompson is “active in the Central Florida Tea Party Patriots.”
According to Iskandar, “he suddenly became a major figure without the credentials.”
Gavison by no means belongs to the far left, and her Zionist credentials are impeccable.
"letters entitling the bearer to certain credit or confidence," 1670s, from Medieval Latin credentialis, from credentia (see credence). Probably immediately as a shortening of letters credential (1520s, with French word order); earlier was letter of credence (mid-14c.).
"that which entitles to credit," 1756, probably a back-formation from credentials. Earlier in English as an adjective, "confirming, corroborating" (late 15c.). As a verb, "provide with credentials," by 1828 (implied in dredentialed).