The Illinois Notice to Interested Parties is a document that must be served to all interested parties in a legal action in the state of Illinois. It is a notice of the commencement of a judicial proceeding, such as a foreclosure, partition suit, or other such action, and it must be served to all parties with a legal interest in the outcome of the case. The notice must include the case name and number, the court where the action is pending, the names and addresses of the parties, and other information as required by the court. There are two types of Illinois Notice to Interested Parties: the Notice of Action to Interested Parties and the Notice of Appearance of Interested Parties. The Notice of Action must be served to all parties with an interest in the action, while the Notice of Appearance must be served to all parties who have appeared in the action.