Mississippi Code Title 11. Civil Practice and Procedure § 11-49-1

Any attorney whose name is subscribed to or indorsed on any declaration or bill or petition in chancery, shall, on demand in writing, made by or on behalf of the defendant, declare forthwith, in writing, whether the suit has been brought by him, or with his authority or privity, and also the place of abode of the plaintiff; and if such attorney shall state that the suit was not brought by him, or with his authority or privity, or shall refuse to declare the place of abode of the plaintiff, then no further proceedings shall be taken in the action without leave of the court.