Definition
Form I-539
Application to Extend or Change Nonimmigrant Status.
I-539 is used by nonimmigrants in valid status to extend their stay or change to a different nonimmigrant category — for example, from B-2 visitor to F-1 student, or to add dependents to a worker's status.
See also
Not legal advice. Definitions are provided for educational use. For case-specific guidance, consult a licensed immigration attorney.