Under the North American Free Trade Agreement (NAFTA), certain citizens of Canada and Mexico are eligible to enter the U.S. under the nonimmigrant TN status. The TN Visa enables Canadian and Mexican citizens to temporarily work in U.S. in a NAFTA-approved professional occupation. The following are the requirements to be eligible for the TN Visa:

1. The profession be on the NAFTA list.
2. The foreign national must possess the necessary training for that profession.
3. The proposed position must be classified as a professional position.
4. The foreign national must work for a U.S. employer.

Canadian Citizens may apply for the TN-1 Visa, and Mexican citizens may apply for the TN-2 Visa. Spouses and/or unmarried children under the age of 21 are eligible to enter the U.S. under the derivative TD-1 and TD-2 visas. Family members are not required to be Canadian or Mexican citizens, and are eligible to remain in the U.S. for the duration of the TN Visa holder's stay. They may either accompany the TN Visa holder to the U.S. or come at a later time.