Applying for a US visa requires a well-prepared set of documents. The following are the basic documents that are needed for a US visa application:

1. Valid passport – A passport that is valid for at least six months beyond the applicant’s intended stay in the US is required. It should also have at least one blank page for the visa.

2. DS-160 confirmation page – This is the online nonimmigrant visa application form that must be completed by all applicants. The confirmation page should be printed and brought to the visa interview.

3. Visa application fee receipt – The visa application fee must be paid before the visa interview. The receipt must be presented during the interview.

4. Photo – A passport-style photo that meets the US visa photo requirements must be submitted. The photo should be recent, in color, and have a white background.

5. Supporting documents – These documents vary depending on the type of visa being applied for. For example, for a tourist visa, supporting documents may include a letter of invitation from a US citizen or resident, proof of accommodation, and proof of financial support.

6. Interview appointment letter – After filling out the DS-160 form and paying the visa fee, an appointment for an interview at a US embassy or consulate will be scheduled. The appointment letter should be printed and brought to the interview.

It is important to note that the US visa application process can be lengthy and complex. Therefore, it is advisable to start the application process early and to seek the assistance of a qualified immigration attorney or visa specialist.

In conclusion, the above documents are the basic requirements for a US visa application. However, additional documents may be required depending on the type of visa being applied for. It is important to carefully review the requirements and to ensure that all documents are complete and accurate before submitting the application.