New Jersey Statutes Title 56. Trade Names, Trade-Marks and Unfair Trade Practices 56 § 8-144

a. All registrants shall prominently display their registration numbers within their places of business, in all advertisements distributed within this State, on business documents, contracts and correspondence with consumers of home improvement services in this State, and on all commercial vehicles registered in this State and leased or owned by registrants and used by registrants for the purpose of providing home improvements, except for vehicles leased or rented to customers of registrants by a registrant or any agent or representative thereof.

b. Any invoice, contract or correspondence given by a registrant to a consumer shall prominently contain the toll-free telephone number provided pursuant to section 14 of this act.  1