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Nathalie Petrignet
Partner

Nathalie Petrignet

Languages
  • French
  • English
Social media

Nathalie Pétrignet joined CMS Francis Lefebvre in 1989 and became a partner in 2009. 

She advises on French and European competition law and focuses on restrictive competition practices, trade negotiations, distribution policy, sales promotion and advertising law, and the circular economy. 

Her practice concentrates on businesses in the consumer market, clients for whom ensuring their sales and marketing policies are aligned with competition law is of critical strategic importance. She also works on audits to ensure compliance with payment terms. 

She advises and acts for clients in litigation proceedings before the commercial courts and the French and European competition authorities. She also conducts audits of operations for groups and professional associations, advises clients on establishing and monitoring compliance programmes, and assists during investigations and dawn raids. 

Nathalie Pétrignet has developed extensive experience in environment law in B2C relations handling issues including greenwashing, carbon offsetting, the French Climate Act, the anti-waste and circular economy act (AGEC), extended producer responsibility, the eco-contribution, and Triman labelling requirements.

Awards & Recognitions
01
  • Award
    Regulatory Practice, Retail Law - Best Lawyer since 2017
    Best Lawyers

Publications

  • Economie circulaire : un foisonnement de nouvelles obligations pour les professionnels, Dossier BRDA 4 (2025) 
  • Règles actuelles applicables aux négociations commerciales, Approche critique, BRDA 17 (2024) 
  • Loi Descrozaille ou EGalim 3 : le droit des relations commerciales encore réformé, Revue Concurrences n° 1 (2024)

Memberships & Roles

  • Member of the French association for competition research (AFEC) 
  • Lecturer, Formations Francis Lefebvre professional training programmes

Lectures list

  • Round table on transparency and restrictive trade practices, Colloque AFEC (24/06/2024)  
  • Négociations commerciales et loi Egalim III, (June 2023)

Education

  • Specialisation certificate in community law (1995) 
  • Graduate, Institut du Droit des Affaires (IDA), Université Paris II - Panthéon-Assas (1989) 
  • DEA (Diplôme d’études approfondies) in business and economic law, Université Paris II - Panthéon-Assas (1988)

Insights by Nathalie

The Green Claims Directive – a legal update on developments, evolving enforcement, and overview of local regulations and judgments in selected jurisdictions

11 Sep 2025 4 min read

Greenwashing directive - rules and practices for sustainable communication

14 Mar 2025 1 min read

France and its TRIMAN logo targeted by the EU Commission!

25 Nov 2024 2 min read

Green/sustainability claims and advertising and consumer greenwashing

15 Apr 2024 3 min read
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