N.J. Stat. § 17B:33-3
Service of process and other papers upon the commissioner as the true and lawful attorney of an unauthorized insurer pursuant to this chapter may be effected by any person lawfully authorized to serve process and other papers in civil actions generally by delivering or by mailing by certified or registered mail, return receipt requested, 2 copies thereof, together with the fee prescribed by law, to the commissioner or to someone designated by him in his office. Such service shall be effective and valid notwithstanding that the county in which the court is situated or in which venue is laid is a county other than that in which the commissioner's office is located. Upon receipt of any such service, the commissioner shall within 2 days thereafter (excluding Saturdays, Sundays and holidays) mail one of said copies by certified or registered mail, return receipt requested to the defendant addressed to it at its principal place of business, or to its registered office or to a registered agent for service. The commissioner shall keep a record of all process and papers so served upon him and of the mailing thereof to defendant. Upon so giving notice to the defendant of the service made upon him on its behalf, the commissioner shall forward to the clerk of the court for filing his certificate of the service upon him and of the notice given by him.
N.J.S. § 17B:33-3