When a marriage is declared null and void, as if it never existed in the first place. This requires evidence and a complicated court application. You will not qualify for an annulment based solely on the short length of your marriage. Even if you were only married for a day or two before separating from your spouse, you likely still have to use the regular divorce process to end your marriage. Annulments are very rare, and can only be used in certain situations - usually dealing with lack of consent or fraud.