ATTEST

[verb] - to show (something) or to say or prove that something is trueThousands of people came out onto the streets to attest their support for the democratic opposition party. [T]The number of old German cars still on the road attests (to) the excellence of their manufacture. [T; I + to]As his career attests, he is a cricketer of world-class standard. [I](specialized) The will needs to be attested (= signed to show that the signature of the person who made the will is correct) by three witnesses. [T]