Chmielniak Adwokaci
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Specialist white-collar crime and compliance boutique Chmielniak Adwokaci is known for advising individuals and companies across Poland on criminal and fiscal-penal matters. The team acts primarily for board members, senior executives, compliance officers and owners of businesses, and is particularly experienced in cases involving managerial liability, financial and accounting offences, tax fraud and breaches of corporate duties. Łukasz Chmielniak and Marcin Klonowski jointly helm the practice. Founding partner Chmielnak specialises in criminal and penal-fiscal disputes, and Klonowski is active in criminal audits.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘The lead partner - Marcin Klonowski - we work with is hands-on, highly available, and unflappable under pressure. What differentiates he is courtroom presence paired with meticulous preparation, plus the ability to communicate options succinctly so executives can decide quickly. Associates are trusted to run work streams efficiently, escalate only when needed, and keep documentation immaculate. Qualities I value most: responsiveness, judgement on when to fight vs. settle, and the creativity to propose non-standard but legally robust solutions.’
- ‘Attorney Marcin Klonowski is a dependable and competent lawyer with solid expertise in his field. He approaches legal matters with professionalism and diligence, ensuring that clients receive clear guidance and well-prepared solutions. His pragmatic style and consistent commitment make him a trustworthy legal advisor.’


