What are the legal requirements for an annulment?

What are the legal requirements for an annulment? Annulments in general fall under several categories. Fraud, duress, undue influence, lack of capacity, bigamous marriages, perhaps. Annulments in Oregon are somewhat rare. They're very detail oriented, and they're very, very fact specific. If you're looking at an annulment in Oregon, in a, say, short term marriage, it's definitely something you want to talk to a qualified attorney about because they're so heavily fact specific.