SIS II: Schengen Information System II

02 June 2021

The purpose of the Schengen Information System II (SIS II) is to enable the Member States of the Schengen area to establish a common policy for monitoring entry into the Schengen area and thus to facilitate the free movement of their nationals while maintaining public order and security.

91 million
of alerts in 2019 in the SIS II database

In 2019, the Schengen Information System was the subject of 6.6 billion searches or queries by member states, an 8% increase over 2018.

The main purpose of the database is to ensure a high level of security within the Schengen States in the absence of internal border controls, by allowing the competent national authorities, such as police forces and border guards, to enter and consult alerts on persons or objects.

This file consists of:

  • a central system (the “Central SIS II”);
  • a national system (the ‘N.SIS II’) in each of the Member States, consisting of the national data systems which communicate with Central SIS II. A N.SIS II may contain a data file (a ‘national copy’), containing a complete or partial copy of the SIS II database. The national IT system of the Schengen Information System "N.SIS II" is placed under the authority of the Directorate General of the National Police of the Ministry of Interior;
  • a communication infrastructure between the central system and the national systems, providing a virtual encrypted network dedicated to SIS II data and to the exchange of data between the bodies responsible for the exchange of all supplementary information.

Who is responsible for the file?

Criteria for inclusion in this file

Information contained in this file

Who can register?

How long is the information kept?

Who consults this file?

How are people informed?

How can I access my file or have my information rectified?

  1. In order to exercise his/her rights, the person must contact the Ministry of Interior:

Ministère de l'intérieur

Place Beauvau

75800 Paris Cedex 08

The Ministry has 2 months to answer from the date of receipt of the request.


  1. If the ministry refuses to answer (by sending a letter or remaining silent beyond the 2-month deadline), the person may contact the CNIL to request its intervention:

Commission nationale de l'informatique et des libertés

3 Place de Fontenoy

TSA 80715

75334 PARIS CEDEX 07


The person must then imperatively communicate to the CNIL:

  • a copy of an identity document;
  • any element justifying the sending of the request to the Ministry (copy of the answer sent to him by the Ministry, of the letter sent to the Ministry or of the acknowledgement of receipt of this letter);
  • the applicant's mailing address.

The SIS II Supervision Coordination Group

In order to ensure the coordination of the supervision of the second generation Schengen Information System, representatives of the national data protection authorities ("national DPAs") and the European Data Protection Supervisor usually meet twice a year. The national DPAs represented are those of the 27 EU Member States, with Ireland participating as an observer. The national data protection authorities of Iceland, Liechtenstein, Norway and Switzerland are also part of the group, as their countries also participate in the Schengen Information System.
You can find more information on the work of this group (minutes of meetings and recently adopted documents).

Revision of the SIS II legal framework