About Marcin
Marcin Ajs is an advocate and expert in international and white-collar criminal law. He is a Partner at Dziekański Chowaniec Ajs and a member of the European Criminal Bar Association (ECBA). Since 2014, he has represented clients in cases involving the European Arrest Warrant (EAW), INTERPOL Red Notices, and extradition proceedings.
Marcin advises companies and individuals on criminal liability, corruption, VAT fraud, and financial crimes. He also develops compliance programmes designed to prevent legal risks before they escalate into criminal proceedings — offering clients both defensive and proactive legal strategies.
His ECBA membership and cross-border practice give him direct access to the latest developments in EU criminal cooperation, making him particularly effective in EAW matters involving Poland, Germany, and other EU member states.
Areas of Practice
- European Arrest Warrant defence (EU)
- Interpol Red Notice removal
- White-collar crime defence
- VAT fraud and corruption cases
- Compliance programme development
Working with Marcin
White-collar cases generate the largest documentary records in this field, and the defence usually turns on detail rather than principle. Whether the conduct alleged satisfies dual criminality, whether the evidence would meet the standard required in the requested state, and whether the prosecution is in substance commercial rather than criminal are the questions that decide outcomes. Within the EU the European Arrest Warrant compresses the timetable considerably, which makes early engagement with counsel in both jurisdictions the practical difference. Where an Interpol notice sits behind the request, the notice itself is a separate target and should be treated as one. In practice the documentary burden is what sets the timetable: certified translations, financial records and expert evidence take time to assemble, and requests are frequently answered before that work is complete.
Related: European Arrest Warrant defence financial crime defence.