certify

transitive verb | \ ˈsər-tə-ˌfī \ | cer·ti·fy

1. a : to give assurance of the validity of certify corporate records

   b : to designate (a labor union) as an exclusive bargaining agent or representative

   c : to state as being true or as reported or as meeting a standard refused to certify the suit as a class action and dismissed it —Marcia Coyle

2. : to guarantee (a personal check) as to signature and amount by so indicating (as by stamping certified) on the face — see also certified check at check

3. a : certificate, license

   b : to designate (a labor union) as an exclusive bargaining agent or representative