N.J. Stat. Ann. § 45:14D-16b

4. It shall be an unlawful practice for a public mover, warehouseman, or any other person, whether or not holding a license issued pursuant to section 9 of P.L.1981, c.311 (C.45:14D-9), who engages in the business of public moving or storage who knows, or reasonably should know, that the lawfully agreed charges for the moving or storage services have been paid in full by a consumer, to withhold or fail to timely release the consumer's property to the consumer, or to threaten to withhold or fail to timely release the consumer's property to the consumer, or to demand payment beyond or in addition to the lawfully agreed charges for the moving or storage services. Nothing in this section shall be construed to preclude or limit the prosecution or conviction of any person for theft by failure to make required disposition of property in violation of N.J.S.2C:20-9, or any other applicable criminal offense enumerated in chapter 20 of Title 2C.