Approver

Webster's Dictionary of the English Language

·noun An informer; an Accuser.

II. Approver ·vt A bailiff or steward; an Agent.

III. Approver ·noun One who approves. Formerly, one who made proof or trial.

IV. Approver ·noun One who confesses a crime and accuses another. ·see 1st Approvement, 2.