Dress appropriately for the event; wearing business attire can show that you take the process seriously & respect it. Finally, to allow for security checks & any last-minute delays, get to the embassypaly rummy or consulate well in advance of your appointed time. Documents Needed to Apply for a US Visa in India Depending on the kind of visa being applied for, different requirements apply, but generally speaking, all applicants need to prepare a few essential documents. It is imperative that your passport remains valid for at least six months after the duration of your intended stay in the United States.