If you are an Illinois resident, the timeframe depends on the ground for annulment. For lack of capacity to consent to the marriage, the petition needed to be filed w/i 90 days; for inability to consummate the marriage, the petition must be filed w/i one year; and for underage marriages, the petition must be filed prior to the time the underage party reached the age of maturity.
Answered on Jun 26th, 2013 at 1:24 PM