N.J. Stat. Ann. § 22A:2-18

In any cause or proceeding in which the papers filed with the Clerk of the Superior Court shall be exceptionally numerous or other work done by him shall be exceptionally onerous, he may make application to the court, on notice, for an order fixing and allowing a reasonable additional fee to be paid to him for the use of the State. The court, in each such case, may make such order fixing and allowing such additional fee, if any, as shall be deemed just and reasonable under the circumstances and directing how and by whom the same shall be paid.