Illinois Summons is a court document that is served upon a defendant, informing them of a civil lawsuit that has been filed against them and requiring them to appear in court on a specific date. This document is served by a sheriff or other court-appointed process server, and contains the names of the parties involved in the lawsuit, the court name and address, the case number, and the date and time of the hearing. There are several types of Illinois Summons, including Civil Summons, Citation to Discover Assets, Citation to Recover Property, and Show Cause Order.