A K-1 visa is a dual intent visa issued to the fiancé or fiancée of a United States citizen to enter the United States. A K-1 visa requires a foreigner to marry his or her U.S. citizen petitioner within 90 days of entry. Once the couple marries, the foreign citizen can adjust status to become a lawful permanent resident of the United States (Green Card holder). Although a K-1 visa is legally classified as a non-immigrant visa, it usually leads to important immigration benefits and is therefore often processed by the Immigrant Visa section of United States embassies and consulates worldwide.