What is the difference between an IV and a nonimmigrant visa (NIV)?
Entering the U.S. with an IV allows the bearer complete freedom of choice as what the bearer may do in the U.S. and for how long. An NIV is for a specific purpose and time limit in the U.S., such as a short term visit, study or temporary work with a specific employer. Please see our nonimmigrant visa page for more information.