So you have an alien (non-U.S. citizen) spouse who still lives in his/her county, or who lives here in the US, but has visas other than Green Card. There are mainly 4 requirements for you as a U.S. citizen or a legal permanent resident to apply for Green Card based on your marriage. 1. The petitioner is a U.S. citizen or a legal Permanent Resident. 2. The marriage is legal in the US. 3. The petitioner has enough income to support his/her alien spouse. 4. The married couple re