In Kansas, a marriage can be annulled if the marriage is either void or voidable. A marriage cannot be annulled merely because the spouses have only been married for a short time. Likewise, a marriage cannot be annulled because one or both spouses decide the marriage is not what they expected or that it was a mistake. If an annulment is granted, legally it is as if the marriage never occurred.
A void marriage is a marriage that was prohibited by the laws of the state where the couple was married. Examples of a void marriage are marriages where the couple is too closely related (first cousins or closer) or when one spouse is still married to another person. Kansas courts must grant the annulment of a void marriage.A voidable marriage is a marriage that may be invalidated by one of the spouses because of some undisclosed material fact that existed at the time of the marriage. Examples of voidable marriages include those in which one or both spouses did not know a material fact that existed when they were married and would have led them to not enter into the marriage it they had known (mistake of fact), or when a spouse entered into the marriage based on a fraudulent misrepresentation. If a marriage is voidable, a Kansas court may, but is not required to grant an annulment.
In Missouri, an annulment will only be granted under limited circumstances. First, the marriage generally must be of very sort duration and produce not children. Second, the marriage must have been entered into based on a material misrepresentation by the other spouse regarding an essential core of the marital relationship. Missouri courts have recognized several common types of fraud including concealing a medical condition, misrepresenting the ability to consummate the marriage, and even lying that you were about to be released from prison. It must be proven that the spouse made the misrepresentation knowing it was false, the intentional misrepresentation was made for the purpose inducting the other person to marry, and that the marriage would not have taken place if the misrepresentation was known.