A fault divorce requires proving one spouse’s wrongdoing in court. If the court believes the spouse is at fault, then the divorce may be granted. Fault divorce may be pursued on the grounds of: Adultery Desertion Extreme cruelty Separation Voluntary substance abuse Mental illness Incarceration Deviant sexual conduct No fault divorce, on the other hand, means that the parties have been experiencing “irreconcilable differences” in their marriage for a period of six months or more and they don’t believe these differences can be resolved. So long as at least one of the parties has been living in New Jersey for a period of twelve consecutive months or more, the parties can then file for no fault divorce. With this approach, neither party has to prove in court that the other is to blame.