Schengen Information System

Overview
The Schengen Information System (SIS)

"is the most widely used information-sharing instrument today. Competent national authorities can use it to consult alerts on wanted or missing persons and objects, both inside the Union and at the external border. The SIS was upgraded in early 2015 to improve information exchange on terrorist suspects and to reinforce the efforts of Member States to invalidate the travel documents of persons suspected of wanting to join terrorist groups outside the EU. The Commission will look into possibilities to help Member States to implement travel bans set at national level. The Commission will evaluate the SIS in 2015-2016 to assess whether new operational needs require legislative changes, such as introducing additional categories to trigger alerts."