TN status or TN visa is a special non-immigrant status in the United States, Canada, and Mexico that offers expedited work authorization to a citizen of these countries. It bears a similarity, in some ways, to the US H-1B visa, but also has many unique features. Within the TN set of occupations, a United States, Canadian, or Mexican citizen can work in the one of the other two countries for up to three years. The permit may be renewed indefinitely.