Topic summary
TN visa

Extracted from the Wikipedia article TN status.
Mexican citizens in the United States
Unless already physically present in the United States and maintaining lawful status in a different classification (and thus potentially eligible for a "Change of Status" procedure to TN classification), a Mexican citizen must first obtain a U.S. TN-2 visa at an American consulate (typically in Mexico). Once the TN visa foil is affixed to the Mexican citizen's passport, he or she may seek admission into the U.S. in TN status in a similar manner to a Canadian citizen. In fiscal years 2007 through 2009, between 4,000 and 5,000 TN visas (including TN-2 visas for Mexicans) were issued by U.S. consulates each year.