CREDENCE Copy link • CREDENCEfides: auctoritas (authority). (The words are found in this connection and order), auctoritas et fides: to procure credence to anything, alicui rei fidem facere, or afferre or addere: anything gains or obtains credence, additur alicui rei fides: to lose credence, fidem amittere. [Vid :, also, FAITH.] A letter of credence; Vid: CREDENTIALS.