Marriage-based green card petitions are carefully scrutinized by U.S. Citizenship and Immigration Services (USCIS). Marriage-based petitions have special priority and allow immigrant spouses to live, work, and study in the U.S. legally. One of the most significant reasons that I-130 petitions get denied, or marriage fraud is suspected, is because of lack of evidence of a bona fide marriage. In order to qualify, you must be able to show USCIS that you are sharing or have plans to share a life together.