N.J. Stat. § 17B:33-7
Before any unauthorized insurer shall file or cause to be filed any pleading or other paper in any action or proceeding instituted against it in any court of this State, such insurer shall either a. deposit with the clerk of the court cash or securities or file with such clerk a bond approved by the court as to the sureties and in an amount fixed by it sufficient to secure the payment of any final judgment which may be rendered; provided, however, that the court may, on notice and hearing, dispense with such deposit or bond upon being satisfied that the insurer maintains, in a State of the United States, funds or securities, in trust or otherwise, sufficient and available to satisfy any final judgment which may be entered; or b. procure a certificate of authority to transact the business of insurance in this State.
N.J.S. § 17B:33-7