yes, laws vary by state
depends on many things. Most times it has to be done within a timeframe of getting married, and you have to be able to show why you request an annulment, without good reason they let you just get a divorce. So proof it was a mistake.
نعم حسب تقاليد وعادات الديانه اولا
ثانيا حسب قوانين الدوله
ويجب اظهارطلب الغاءه