N.J. Stat. § 45:18-1: Collection agencies to file bond

No person shall conduct a collection agency, collection bureau or collection office in this state, or engage therein in the business of collecting or receiving payment for others of any account, bill or other indebtedness, or engage therein in the business of soliciting the right to collect or receive payment for another of any account, bill or other indebtedness, or advertise for or solicit in print the right to collect or receive payment for another of any account, bill or other indebtedness, unless such person, or the person for whom he may be acting as agent has on file with the secretary of state sufficient bond as hereinafter specified.