An Illinois Summons-alias Summons is an official court document issued by a court in the state of Illinois that notifies a defendant of the charges against them and the date of their court hearing. It is served by the sheriff or a process server to the defendant either in person or by mail. There are two types of Illinois Summons-alias Summons: original and alias. An original summons must be served upon the defendant in person, while an alias summons may be served by mail. The summons must include the name of the court, the title and number of the case, the name of the plaintiff and defendant, the date and time of the court hearing, and the consequences of failing to appear in court.