make legal

legitimize

allow permit regulate sanction

declare lawful

deny disallow disapprove refuse reject

approve certify confirm corroborate endorse justify legalize legitimize ratify substantiate verify

authenticate authorize constitute okay sanction

John Hancock bear out give stamp of approval give the go-ahead give the green light give the nod make binding make stick rubber-stamp set seal on sign off on

contradict deny disagree disallow disapprove discredit disprove invalidate oppose refuse reject repudiate veto