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Grounds for Annulment in Illinois — the Illinois State Bar Tells You

Question:  What are the grounds for annulment in Illinois? Answer:  Grounds for annulment vary in different legal jurisdictions but are typically limited to fraud, bigamy and mental incompetence.  In Illinois, they may include the following circumstances:  A party lacked capacity to consent to the marriage at the time that the marriage was solemnized, either because of mental incapacity or infirmity or because of the influence of alcohol, drugs or other substances, or the party was forced into the marriage fraudulently;  a party lacked the physical capacity to consummate the marriage (within one year); a party was under age 18 and did not have the consent of his or her parents or guardian or judicial approval (the marriage can be declared invalid prior to the time that the person reaches age 18 when the party could have married legally).     For more information about Illinois law, visit  If you have a legal question, send it to Illinois Law Now is a series of newspaper and internet posts prepared by the Illinois State Bar Association that address legal issues of interest to the public. For additional information about the law, visit