At the end of November 2025, Europol and Eurojust helped German and Swiss authorities during a coordinated action week in Zurich that led to the takedown of the illegal cryptocurrency mixing service “Cryptomixer”. The service is suspected of having facilitated cybercrime and money laundering since 2016. It has allegedly enabled the laundering of over €1.3 billion in Bitcoin by obscuring transaction trails linked to offences including ransomware attacks, drug and weapons trafficking, and payment card fraud.

As key domains were located in Germany and servers in Switzerland, authorities from both countries collaborated closely to conduct investigations and take action against the service. A joint investigation team was established at Eurojust to enable real-time exchange of information and evidence. Europol provided operational coordination, intelligence exchange through the Joint Cybercrime Action Taskforce (J-CAT), and on-the-spot forensic support.

During the action days, law enforcement seized three servers, the cryptomixer.io domain, over 12 terabytes of data, and more than €25 million in cryptocurrencies. A seizure notice was placed on the website.