Use a Premarital Agreement to Protect both Parties! - Organize Your Rights and Obligations! Also referred to as prenuptial, pre-nuptial, or antenuptial agreements, U.S. Legal Forms™, Inc., offers premarital (prenuptial) agreement forms and law summaries drawn to meet the requirements of the State of Illinois. The forms package include financial statements for both parties to complete.  Free Previews available.