Annulment differs from divorce in that, with an annulment, the court rules that your marriage never happened. By contrast, a divorce acknowledges that you were married, but ends the marriage. The Michigan Revised Statutes provide that under a few circumstances, a court can declare a marriage void because it shouldn’t have happened in the first place since the union is in violation of the law; for example, if you were underage when married or still married to your previous spouse. Michigan will also annul voidable marriages, those in which some issue existed at the time of your marriage that violates the integrity of the union.
Fraud as Grounds
Grounds for divorce happen after you get married, whereas grounds for annulment exist at the time you marry. Michigan recognizes fraud as grounds for annulment, but some rules apply. For example, if your spouse neglected to tell you that she was married four times before, this does not typically constitute fraud for purposes of an annulment because her lie doesn't invalidate your relationship. If she told you she was the president's daughter, this isn't necessarily fraud either – you could have verified the accuracy of this statement. The lie or misrepresentation must be something that is "wholly subversive to the true essence of the marriage relationship," according to the Michigan Court of Appeals. This might be the case if your spouse only married you to secure a green card, but you didn't know she wasn't a United States resident. Under Section 552.2 of the Michigan Revised Statutes, some instances of fraud can cause your marriage to be void – not voidable – if you never lived together after you married.
Intentions of Spouse
Another component of using fraud as grounds for annulment in Michigan is that your spouse must never have intended the marriage to be "real." For example, if she was only marrying you for a green card, she probably did so without any intention of making the union work. If she knew she was still legally married to someone else, she was aware at the time of your wedding that your marriage was illegal and thus, not valid. Fraud must be more than misleading – it must be a deliberate attempt to deceive you or your spouse must have entered into the marriage with knowledge that sustaining it would be impossible.
Given the uphill battle of proving fraud as grounds for annulment in Michigan, it might be easier and much quicker to file for divorce instead – assuming you don't have strong religious or other reasons for wanting the court to declare that your marriage never existed. Michigan is a "pure" no-fault divorce state. As such, it does not recognize any fault grounds. You need only tell the court your marriage is broken and there's no hope of fixing it, and you can get a divorce without proving any misconduct on the part of your spouse – or what she was thinking at the time she committed the misconduct.