Editing Schengen Information System (section)

== Data ==
The type of data about people kept in SIS includes: requests for extradition; undesirability of presence in particular territory; minor age; mental illnesses; missing person status; a need for protection; requests by a judicial authority; and suspected of crime. The SIS also keeps data referring to lost, stolen and misappropriated firearms, identity documents, motor vehicles and banknotes.

Individuals listed in SIS may request data corrections or removal if the entry is incorrect or lacks sufficient justification. Applications must be submitted to the relevant national authority, often requiring supporting documentation such as court rulings or police reports. Processing times vary by country, and legal assistance can improve the chances of success, particularly in complex cases.

[[France]] is responsible for management of SIS and uses an automated system of data updates which occur every five minutes. The SIS automatically directs data to queries arriving via large national databases. Each member nation has an office responsible for SIS communications. SIS also has a function called "Supplementary Information Request at the National Entry" (SIRENE). The SIRENE office records a "hit" on a SIS data record and forwards further information to assist investigations.