'Certificate' in the Bible

“It has also been said, ‘Whoever divorces his wife is to give her a certificate of divorce’;

The Pharisees said to Him, “Why then did Moses command us to give her a certificate of divorce and send her away?”

If I am not [considered] an apostle to others, at least I am one to you; for you are the seal and the certificate and the living evidence of my apostleship in the Lord [confirming and authenticating it].