Illinois Notice Requiring Appearance in Pending Action is a legal document issued in the state of Illinois by a judge or court clerk, requiring a party to appear in a pending action. It is typically issued when the court needs to hear from a party in a case. Generally, this notice is sent to the defendant or the attorney representing the defendant, informing them that they must appear in court at a specific date and time. There are two types of Illinois Notice Requiring Appearance in Pending Action: an Order to Show Cause and a Summons. An Order to Show Cause is an order from the court requesting a person to explain why the court should not take certain action. A Summons is a written notice from the court that informs a party of a pending legal action against them and their rights in the case.