The US-VISIT (United States Visitor and Immigrant Status Indicator Technology) Program is a system that is used at ports of entry to establish and verify the identity of international visitors to the United States (most citizens of Canada are exempt from US-VISIT).
Upon entering the United States, U.S. Customs & Border Protection (CBP) officers review travel documents and ask questions about the visitor’s stay in the United States. CBP officers then scan visitor's fingerprints on an inkless scanner and take a digital photograph.
Presently there are no US-VISIT exit procedures in place for visitors departing the United States but plans to implement new biometric exit requirements are expected within the next year.
The data collected from F, J or M visa holders will be forwarded to SEVIS (Student and Exchange Visitor Information System), confirming that the person has entered or exited the United States.
For more information, please see the US-VISIT website.