The important fault cause of action is adultery. You would file under adultery if you believe your spouse has dissipated assets with regards to spending money on an affair and that is a legitimate and important reason for people to file for fault divorce. There are also fault causes of action in cases of extreme cruelty, desertion, addiction or habitual drunkenness, imprisonment, institutionalization, and deviant sexual conduct.
Alison C. Leslie, Esq. practices family law exclusively in her Morristown, NJ offices, where she offers her clients the individualized attention of a solo practitioner with the experience of a larger firm. She can be reached at (973) 631-8002. View her website and Divorce Magazine profile.