2A:44A-16. Party defendants joined by claimant, entitlement to defense
16. a. A claimant shall join as party defendants the contractor or subcontractor who is alleged to have failed to make the payments for which the lien claim has been filed and any other person having an interest in the real property that would be adversely affected by the judgment. A party required to be joined under this subsection shall be joined if feasible pursuant to R.4:28-1(a) of the Rules Governing the Courts of the State of New Jersey, unless prohibited by law.
b. Any party to an action to establish a lien shall be entitled to any defense available to any other party in contesting the amount for which a claimant seeks to have his lien reduced to judgment.