The fiancé(e) or K-1 visa is for foreign nationals who enter the United States with the intention of marrying a U.S. citizen. The U.S. citizen Sponsor needs to file a petition with the USCIS. Once approved, the foreign national financé can apply for a K-1 visa at a U.S. Consulate in the country where he or she resides. The foreign national must marry the U.S. Sponsor within 90 days after entry to the U.S.