The Schengen Information System (SIS) is a pan-European information exchange system aimed at enhancing the internal security of the Schengen Area countries by strengthening control over their external borders. It is the largest database in Europe. The system records individuals who have violated the laws of these countries or breached their visa regulations, as well as items that have been stolen, lost, or unlawfully appropriated. Access to the Schengen Information System (S