An Illinois divorce court must include the third party on the deed to a marital property if the Illinois court wishes to properly finalize the divorce. The first step to dividing the home is figuring out whether or not you want it.If one or neither of you want it, the process usually goes much smoother. A postnup is a binding agreement that you and your spouse enter into after you are legally married. In almost every other way, a postnup is just like a prenup. This agreement is intended to help the parties formalize an allocation of their property and finances. County offices and the Illinois Department of Revenue use this form to collect sales data and to determine if a sale can be used in assessment ratio studies. A property settlement agreement becomes a legally binding part of the final judgment when your marriage is officially dissolved. They cannot be used to transfer community property to third parties. Martin, Judge, presiding. Judgment.