New Jersey Statutes Title 3B. Administration of Estates Decedents and Others 3B § 14-41

The failure of a fiduciary to plead in an action against him in a representative capacity that he has fully administered the estate or the extent to which he has administered the estate shall not preclude him from proving his due administration of the estate in an action against him personally on a judgment recovered against him in the original action in his representative capacity. Notice by the fiduciary of his intention to prove administration must be given 20 days before trial.