endorsement

n. act of endorsing; signature on a document (as in a check or bill); approval, sanction, confirmation (also indorsement)

Endorsement may refer to:Political endorsementEndorsement terrorismEndorsement test, a U.S. Supreme Court test for Church-State separationEndorsement (advertising), or testimonal, written or spoken statement extolling the virtue of some productA notation made on a Driver's licenseA signature on the back of a check, authorizing it to be deposited.A contract to promote a product by a celebrity or athlete.
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(n.)
Same as Indorsement.
  

payment to an individual e.g actor, muscian or athlete to provide a testimonial, make a personal appearance or act as a spokesperson and appear in ads for the company.

An amendment to an insurance policy. (49CFR387)

An authorization to an individual's commercial driver's license (CDL) required to permit the individual to operate certain types of commercial motor vehicles. (49CFR383)