Schengen Information System (SIS)

The Schengen Information System (SIS) is a shared security database used by European countries in the Schengen Area to manage border control and law enforcement. It helps member states exchange information about individuals and objects of interest, such as missing persons or stolen vehicles. When someone crosses a border within these countries, authorities can quickly check SIS for alerts. This system enhances cooperation among police and immigration services, promoting safety and security while allowing for passport-free travel between participating nations.