Applicants for visitor visas must show that they qualify under provisions of the Immigration and Nationality Act. The presumption in the law is that every visitor visa applicant is an intending immigrant. Therefore, applicants for visitor visas must overcome this presumption by demonstrating that:
Applicants for visitor visas should generally apply at the American Embassy or Consulate with jurisdiction over their place of permanent residence. Although visa applicants may apply at any U.S. consular office abroad, it may be more difficult to qualify for the visa outside the country of permanent residence.
Applicants must demonstrate that they are properly classifiable as visitors under U.S. law. Evidence, which shows the purpose of the trip, intent to depart the United States, and arrangements made to cover the costs of the trip, may be provided. It is impossible to specify the exact form the evidence should take since applicants' circumstances vary greatly.
Persons traveling to the U.S. on business can present a letter from the U.S. business firm indicating the purpose of the trip, the bearer's intended length of stay and the firm's intent to defray travel costs. Persons traveling to the U.S. for pleasure may use letters from relatives or friends in the U.S. whom the applicant plans to visit or confirmation of participation in a planned tour. Persons traveling to the U.S. for medical treatment should have a statement from a doctor or institution concerning proposed medical treatment. Those applicants who do not have sufficient funds to support themselves while in the U.S. must present convincing evidence that an interested person will provide support. Visitors are not permit to accept employment during their stay in the U.S. Depending on individual circumstances, applicants may provide other evidence substantiating the trip's purpose and specifying the nature of binding obligations, such as family ties or employment, which would compel their return abroad.