An H1B is a type of visa that pertains to non-immigrant status. Under the Immigration & Nationality Act, this type of visa allows employers in the United States to issue these visas on a temporary basis to employ foreign workers in specialty occupations. The employer therefore applies for and ultimately holds the H1B visa for the employee and if the work is cut short or ends for some reason, then the individual needs to apply for a change of status, look for sponsorship through another employer, or be forced to leave the United States if neither option is viable. There are special rules about what makes a "specialty occupation" and the employer must properly and sufficiently fill out all the paperwork to gain an H1B visa for an employee.