4:5-4. Affirmative Defenses; Misdesignation of Defense and Counterclaim

A responsive pleading shall set forth specifically and separately a statement of facts constituting an avoidance or affirmative defense such as accord and satisfaction, arbitration and award, contributory negligence, discharge in bankruptcy, duress, estoppel, failure of consideration, fraud, illegality, injury by fellow servant, laches, license, payment, release, resjudicata, statute of frauds, statute of limitations, and waiver. If a party has mistakenly designated a defense as a counterclaim or a counterclaim as a defense, the court, on terms if the interest of justice requires, shall treat the pleading as if there had been a proper designation.