An Employment Authorization Document (EAD), commonly known as a "work permit", is a document issued by the USCIS, and provides the holder with the legal right to work in the United States of America. This is not a green card. Some non-residents temporarily staying in the United States may file a Form I-765, Application for Employment Authorization, to request an EAD. The EAD is valid for an amount of time dependent upon the non-resident’s immigration circumstances.