The National Security Entry/Exit Registration System (NSEERS) is a special system of registration for non-immigrant visitors who, based on intelligence criteria, are identified as posing a higher security concern. This system was started in September 2002 as a part of the war on terrorism. This system has two parts: port of entry registration and domestic registration. In both the registration the visitor is fingerprinted, photographed, and interrogated. Such persons have to provide details regarding their plans to the U.S> Immigration and Customs Enforcement (ICE). Changes, if any, have to be updated to the ICE.
The NSEERS requires such intellectual visitors to check in periodically to verify their location, and to confirm that they are complying with the terms under which they were granted admission to the U.S. The SEVIS and US-VISIT databases have put an end the re-registration requirement for whole groups of visitors, such as those from certain nations. However, the U.S. Department of Homeland Security can require individuals to appear for additional registration interviews during their stays.