Schengen and your personal data

The Schengen Information System (SIS) is operated jointly by the Schengen States, among them Switzerland. The SIS holds 26 million alerts on stolen or wanted goods and almost one million alerts on persons wanted by the police or the courts, persons subject to a ban on entry or missing persons.

Everyone has the right to be given information on whether data concerning them is being stored in the SIS and, if so, to have access to this data, to have them corrected or deleted.

https://www.edoeb.admin.ch/content/edoeb/en/home/data-protection/dokumentation/model-letters/schengen-and-your-personal-data.html