Service: Service provides notice to the Respondent that a lawsuit has been filed against them, and provides instruction about how to participate in a case. To ensure you understand the discovery process in your divorce, our Cook County lawyer can help.Download and complete Motion and Notice forms from the Illinois Office of the Courts. This discovery document is a sworn affidavit which outlines a partie's expenses, income, debts, and assets. 2) When completing discovery, it is not always necessary to file a notice of service of discovery every time you request or tender discovery. There are two standard types of "written discovery" issued in family law cases. One document is called a Notice to Produce Documents. What is discovery in a Chicago, Illinois divorce case? There are forms that are available online that a person can fill out to begin the process. The petition is also filed online.