The National Security Entry-Exit Registration System (NSEERS) is a special registration system which was put in place after September 11, 2001. The purpose of NSEERS is to keep track of individuals entering and leaving the United States who are not citizens or permanent residents. Through this tracking system, security has been tightened to safeguard Americans and our borders. More than 35 million nonimmigrant visitors entering or already in the United States are tracked.
The requirement to re-register after 30-days or one year of continuous presence in the United States was no longer enforced after December 2, 2003. In its place, the Department of Homeland Security (DHS) may interview nonimmigrant aliens on an individual basis to determine if they are complying with visa and admission requirements.
However, foreign visitors who deliberately missed a registration deadline on or prior to December 2, 2003, are still considered in violation and subject to penalty.