The Illinois Petition for Dissolution of Marriage is a legal document used to start the process of dissolving a marriage in the state of Illinois. It is filed by one spouse and is then served to the other spouse. The petition includes information such as the date of the marriage, the names and ages of any children involved, the grounds for the dissolution, and a request for certain relief, such as division of property and debts, spousal maintenance, and child support. The types of Illinois Petition for Dissolution of Marriage include the Joint Petition, the Simplified Dissolution, and the Divorce Petition. The Joint Petition is used when both spouses agree to the dissolution of the marriage, while the Simplified Dissolution is a more streamlined process used for spouses who agree on all details of the dissolution. The Divorce Petition is used when one spouse does not agree to the dissolution of the marriage and the other spouse must provide evidence to support their claim.