All agencies and officers in the police service are obliged to accept criminal complaints.
In a case of an immediate emergency, please always report to the police by calling 110.
Germany:
Internet-beschwerdestelle - Against illegal content online:
- Submit a complaint: https://www.internet-beschwerdestelle.de/en/index.html
Online police presence - Online-Wache der Polizei:
United kingdom:
Internet Watch Foundation :
http://www.iwf.org.uk/