Res Judicata in Divorce Cases in Illinois

Article written by Illinois Attorney Kevin O’Flaherty

In this article, we explain res judicata in divorce cases in Illinois. We answer the question, “what is res judicata?” and discuss whether res judicata applies to child custody, child support, spousal maintenance and property division. will also discuss res judicata and property division.

The Latin translation of res judicata is “thing adjudicated.” As it applies to the law, res judicata is a reference to a matter that has already been presented in court and received a final judgement. In accordance with the law, res judicata states that parties cannot litigate a second lawsuit on the same claim or any other claim relating to the first one that could have been brought up during the first suit but was not. There are three criteria that must be met in order for res judicata to apply for your case, and they are as follows:

1. An identity of cause of action exists;
2. A final judgement on the merits as already been rendered by a court of competent jurisdiction; and
3. The parties or their privies are identical in both actions

Res Judicata in Divorce Cases in Illinois

Res Judicata can only apply to certain topics in the Dissolution of Marriage Decree. Any of the following topics cannot be subject to res judicata:

• Child custody and parenting time orders;