A K-1 visa, also known as a fiancé visa, is a non-immigrant visa that allows a foreign fiancé of a U.S. citizen to enter the United States for the purpose of getting married. The K-1 visa is issued to the foreign fiancé and allows them to stay in the United States for up to 90 days. After the wedding, the foreign fiancé can apply for permanent residency in the United States.

To be eligible for a K-1 visa, the U.S. citizen sponsor must meet the following requirements:

The U.S. citizen sponsor must be legally able to marry, meaning that they are not already married or in a domestic partnership.

The U.S. citizen sponsor and foreign fiancé must have met in person within the past two years. There are some exceptions to this requirement, such as if meeting in person would violate cultural or religious customs.

The U.S. citizen sponsor must have a genuine relationship with the foreign fiancé, meaning that the relationship is not primarily for the purpose of obtaining a visa.

The U.S. citizen sponsor must meet certain income requirements, which vary depending on the sponsor's household size and location.

To apply for a K-1 visa, the U.S. citizen sponsor must file a petition with the U.S. Citizenship and Immigration Services (USCIS) on behalf of their foreign fiancé. The petition must include evidence of the couple's relationship, such as photos, emails, and other correspondence. The USCIS will review the petition and, if approved, will forward it to the National Visa Center for processing.

Once the petition is approved, the foreign fiancé can apply for a K-1 visa at a U.S. embassy or consulate in their home country. The application process typically involves completing a visa application form, providing supporting documentation, and attending an interview with a consular officer.

To be eligible for a K-1 visa, the foreign fiancé must demonstrate that they are in a genuine relationship with the U.S. citizen sponsor, that they have not violated any U.S. immigration laws, and that they are not a security risk. They must also undergo a medical examination and provide a police certificate.

In conclusion, a K-1 visa, also known as a fiancé visa, is a non-immigrant visa that allows a foreign fiancé of a U.S. citizen to enter the United States for the purpose of getting married. To be eligible for a K-1 visa, the U.S. citizen sponsor must meet certain requirements and file a petition with the USCIS on behalf of their foreign fiancé. The foreign fiancé must demonstrate that they are in a genuine relationship with the U.S. citizen sponsor and meet other eligibility requirements.