All Illinois Courts must accept these forms. After you upload your "Lead Document" click "Add Optional Services and Fees" and select "Certified Mail" in the.Download and complete Motion and Notice forms from the Illinois Office of the Courts. Learn how to File on an Existing Case in Cook County, Illinois, and view the Filing Status of your documents you have sent to the court. Edit, sign, and share Summons - Circuit Court of Cook County - cookcountycourt online. For more information about going to court including how to fill out and file forms, call or text Illinois Court Help at 833-411-1121 or go to ilcourthelp.gov. This includes the full year. Letter to Special Process Server.