the requirements for its issue are not or no longer fulfilled;
clear identification of the holder is no longer possible;
it contains incorrect or unofficial details or has been otherwise altered.
In the event that naturalisation is declared null and void in accordance with Article 36 of the Citizenship Act of 20 June 20141, the competent authority shall at the same time order the revocation of identity documents.2
Identity documents that have been revoked shall be returned to the competent issuing authority within 30 days. On expiry of this period, identity documents that have been revoked but not returned shall be deemed lost and an alert shall be issued in the computerised police search system (RIPOL).3
An identity document may be revoked or declared invalid by the competent federal authority4after consultation with the competent prosecution or prison authority if its holder is abroad and:
is being prosecuted in Switzerland for a felony or misdemeanour;
has been convicted by the final judgment of a Swiss court and the sentence or measure is neither time-barred nor served.