N.J. Stat. § 39:7-8
From and after April seventh, one thousand nine hundred and thirty, civil process in any action or proceeding arising out of a collision or accident in which any motor vehicle of a nonresident owner, not registered or licensed under the laws of this state, may be served upon such nonresident owner, by service upon any chauffeur or operator of such or any other motor vehicle of such nonresident owner, while such motor vehicle is being operated in this state by such chauffeur or operator. Process in any such action may be also lawfully served upon any such nonresident owner by service thereof upon any person over the age of fourteen years who has the custody of such motor vehicle, whether held by him as security or driven, if a copy of such process is also posted in a conspicuous place upon such motor vehicle.
N.J.S. § 39:7-8