An annulment is different from a divorce because an annulment legally nullifies the marriage, making it as if it never existed. Domestic Relations Law §140 provides for six different grounds where an annulment may be obtained. The following grounds may be used to obtain an annulment: a marriage that was entered into was based on fraud, one partner entered into the marriage because of duress or pressure from their spouse, parties who married were under the age of 18, one of the spouses is unable to understand the nature, consequence or effect of the marriage due to mental incapacity, after the marriage, one of the parties becomes incurably insane for at least five years, or if either spouse was incurably unable to have intercourse at the time of marriage.