endorsement

noun

1. a promotional statement (as found on the dust jackets of books)"the author got all his friends to write blurbs for his book"
2. a speech seconding a motion"do I hear a second?"
3. formal and explicit approval"a Democrat usually gets the union's endorsement"
4. a signature that validates something"the cashier would not cash the check without an endorsement"
5. the act of endorsing"a star athlete can make a lot of money from endorsements"