The Illinois Certificate of Dissolution of Marriage is a document issued by the state of Illinois that officially terminates a marriage. It is used to demonstrate that a valid marriage has been terminated and is necessary for the parties involved to move on with their lives. The two main types of Illinois Certificate of Dissolution of Marriage are a Joint Simplified Dissolution of Marriage and an Uncontested Dissolution of Marriage. The Joint Simplified Dissolution of Marriage is used when both parties agree to all the terms of the dissolution and no court hearing is necessary. This type of certificate must be signed by both parties and filed with the court. The Uncontested Dissolution of Marriage is used when the parties cannot agree to all the terms of the dissolution but still wish to end the marriage. This type must be filed with the court and a hearing may be required. The Certificate of Dissolution of Marriage is a legally binding document that serves as proof of the dissolution of a marriage.