notarize (v.)

• accept
• accredit
• affirm
• approve
• authenticate
• authorize
• autograph
• certify
• confirm
• cosign
• countersign
• endorse
• initial
• pass
• permit
• ratify
• sanction
• seal
• second
• sign
• support
• undersign
• underwrite
• validate
• visa
• vise
• warrant