The Illinois Petition for Dissolution of Civil Union is a legal document that can be used by couples who are in a civil union with one another to dissolve their union. This form is used to initiate the process of ending the civil union in the state of Illinois. The petition must be filled out and filed with the court in the county in which at least one of the parties to the civil union resides. There are two types of Petition for Dissolution of Civil Union: an Uncontested Petition for Dissolution of Civil Union and a Contested Petition for Dissolution of Civil Union. The Uncontested Petition is for couples who agree on all the issues related to the dissolution of the civil union, including the division of property and debts, child custody and support, and alimony. The Contested Petition is for couples who do not agree on all the issues, and they must resolve their differences through the court system.