Although her obligation to pay the mortgage was discharged in bankruptcy, such that the lender doesn't have recourse against her, the property terms of the divorce judgment would normally remain enforceable -- meaning that if your boyfriend as been making mortgage payments that she was supposed to cover, in full or in part, he can ask the family court to order her to reimburse him. If there is equity in the home, he be able to recover that money from his ex's share of the equity when the house is sold. If his ex- is in violation of the court's order, as you indicate, he can also attempt to recover court costs and attorney fees.
If he isn't able to put a motion together in proper form by himself, or get it before the court within a reasonable time frame, all the more reason for him to retain a lawyer.Quoting brendaleek

