The North American Free Trade Agreement (NAFTA) created special economic and trade relationships for the United States, Canada and Mexico including the TN NAFTA visa. This visa classification permits qualified Canadian and Mexican citizens to seek temporary entry into the US to engage in business activities at a professional level. Among the types of professionals who are eligible to seek visas are accountants, engineers, lawyers, pharmacists, scientists, and teachers.
TN NAFTA visa applicants that are Canadian citizens can apply at any US port of entry. Visa applicants that are Mexican citizens must apply for a visa at a US Embassy or Consulate.