Illinois Dissolution of Marriage with Children Petition is a legal document filed when a married couple with children wishes to end their marriage. This petition is used to start the process of dissolving a marriage through the Illinois legal system. There are two types of Illinois Dissolution of Marriage with Children Petition: Joint Petition and Separate Petition. A Joint Petition is filed when both spouses agree on all the issues related to the dissolution of the marriage, such as child custody, property division, and alimony. A separate petition is filed when the spouses disagree on any of the issues. The Illinois Dissolution of Marriage with Children Petition must be filled out with all the necessary information and signed by both spouses. It is then filed with the court, along with other paperwork, such as a financial affidavit, parenting agreement, and a settlement agreement. The court will review the documents and then issue a judgment of dissolution of marriage, which legally ends the marriage.