N.J. Stat. Ann. § 3B:14-44

Upon application by a fiduciary, the court may require any person to appear before and make discovery of his possession of, or knowledge of the existence or whereabouts of personal property of the fiduciary's decedent, ward or trust by the production of books, papers or securities relating to the estate, guardianship or trusteeship or by the examination of the person and other witnesses.