You can file for an annulment if you meet various requirements. In California, a marriage was NEVER legal if it was incestuous or bigamous. In addition, marriages or partnerships can also be declared invalid by a judge due to:
- The age of one or both parties was under 18 at the time of the marriage
- Either party was of unsound mind at the time of the marriage or domestic partnership
- Either party entered the marriage or domestic partnership as the result of fraud
- Either party consented to the marriage or domestic partnership due to force
- The parties entered into a marriage or a domestic partnership while one or both of them were physically incapacitated
