IMMIGRANT VISAS
Visas & Entry to the U.S.
A visa is not a guarantee of entry to the U.S.; a visa simply allows you to seek permission to enter to the U.S. When you seek permission to enter the U.S. at a port of entry an officer of the U.S. Department of Homeland Security (DHS) will question you. At this time the officer can deny entry. A denial can be for one or more reasons, such as, you may have overstayed on a previous visit to the U.S. or your planned activities do not appear to match the type of visa presented. If denied entry, you will either be placed in detention, or temporarily held until return travel arrangements can be made. If you have a visa, it may be cancelled.
To learn more about admission to the U.S., click here.