N.J. Stat. § 19:34-56
Every person upon whom a subpoena issued under and by virtue of this Title shall have been served, and to whom the lawful fees shall have been paid or tendered, shall obey the command of such subpoena, under the penalty of fifty dollars ($50.00), to be sued for and recovered, with costs, in a civil action, before any court of competent jurisdiction, by the person on whose application such subpoena shall have been issued; but no person shall in any case be required to attend any such examination as a witness out of the county in which he resides.
If any person so duly subpoenaed shall neglect or refuse to obey the command of such subpoena, any judge of the Superior Court may, on due proof by affidavit of the service of the subpoena on such witness, and of the payment of his legal fees and of his refusal or neglect to obey the command of the subpoena, issue an attachment against the person to bring him before such judge; and the judge shall have power to proceed against such witness as for a contempt of court.
N.J.S. § 19:34-56