N.J. Stat. Ann. § 2A:40-3

All promises, agreements, notes, bills, bonds, contracts, judgments, mortgages, leases or other securities or conveyances which shall be made, given, entered into or executed by any person, the whole or part of the consideration of which is for any money, property or thing in action whatsoever laid, won or bet in violation of section 2A:40-1 of this title, or for reimbursing or repaying any money knowingly lent or advanced to help or facilitate such violation, shall be utterly void and of no effect.