K1 visa , Form DS-160, Online Nonimmigrant Visa Application is used for US nonimmigrant visas and in this case for the K1 visa too. The form will inquire on your personal information as well as reasons why you are planning to go to the U
The K1 visa holder will get this visa so that they can marry the US citizen within 90 days of arriving in the US. This K1 fiance visa is the first visa that a foreign citizen marrying a US citizen must have. Without having had the K1 visa, the fiancé of the US will then have difficulty adjusting the status to become a Legal Permanent Resident (LPR) of the US.
Necessary Documents for O-1 visa,A written consultation from someone with expertise on your field. It can be a peer group or a labor/management organization, as relevant to your area of expertise.
A copy of the written work contract. The contract must include a summary of the agreement under which you will be employed.