validate


validate (http://definr.com/validate)

     v 1: declare or make legally valid [syn: formalize, formalise]
          [ant: invalidate]
     2: prove valid; show or confirm the validity of something [ant:
         invalidate]
     3: give evidence for [syn: corroborate]
     4: make valid or confirm the validity of, as of a document;
        "validate a ticket" [ant: invalidate]