N.J. Ct. R. 1:5-5

In any civil action in which there are unusually large numbers of defendants, the court, upon motion or on its own initiative, may order that service of the pleadings of the defendants and replies thereto need not be made as between the defendants and that any cross-claim, counterclaim, or matter constituting an avoidance or affirmative defense contained therein shall be deemed to be denied or avoided by all other parties and that the filing of any such pleadings and service thereof upon the plaintiff, or an adverse party in a cross-claim, constitutes due notice of it to the parties. In any such action the court may designate certain parties as representatives for receipt of service for all defendants similarly situated and may order that service of pleadings, motions and other papers filed in the action may be served upon such representatives with the same effect as if all such defendants had been served. A copy of every such order shall be served upon the parties in interest in such manner and form as the court directs.