If you are not a citizen or permanent resident of the United States, you will almost certainly need a visa and know the USA PR requirements. A USA permanent residence visa is a stamp that you get on your travel document, more particularly your passport, that indicates that you are eligible to visit the United States and that you have completed the necessary procedures. Due to the discretion of the Department of Homeland Security (DHS) and the Customs and Border Protection (CPB) Inspectors, having a US visa does not automatically imply that you will be allowed to enter the United States.