commendation, approval - a message expressing a favorable opinion; "words of approval seldom passed his lips"

O.K., okay, okeh, okey, OK - an endorsement; "they gave us the O.K. to go ahead"

visa - an endorsement made in a passport that allows the bearer to enter the country issuing it

nihil obstat - the phrase used by the official censor of the Roman Catholic Church to say that a publication has been examined and contains nothing offensive to the Church