Download and complete Divorce, Child Support, and Maintenance forms from the Illinois Office of the Courts. The discovery process is the investigation phase that follows the filing of divorce or allocation of parental responsibilities.The parties are required to attach supporting documentation to the form. Formal Discovery is the process of obtaining information from the other party. I am doing my divorce pro se, Im attempting to file for discovery. I was told to use form 35.5. "Discovery" is the process that Illinois divorce litigants use to obtain information, usually financial, from the opposing party. Discovery is very useful. Do you have to file anything with the court when you issue or answer discovery in an Illinois divorce? Please be aware that forms will be displayed in a NEW browser window.