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Allen & Overy LLP
52 avenue Hoche

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  Erwan Poisson



Erwan is a Partner in the Litigation department at Allen & Overy Paris. He advises international and domestic companies in complex commercial, civil, and criminal disputes, from the prelitigation stages of a matter, including alternative dispute resolution methods, to Court trials. He also covers representations before the courts of French-speaking African countries in commercial and criminal litigation matters, as well as before international courts (in particular, the ILO Administrative Tribunal).

A general litigator, Erwan notably advises in the areas of banking and finance litigation, where his experience includes liability claims against banks, financial services and investment funds; corporate litigation, including disputes between majority and minority shareholders, disputes related to shareholding agreements as well as representations and warranties.

He has also developed specific expertise in conflicts of laws and jurisdictional issues (a subject he teaches at university), international judicial assistance, asset-tracing and recovery, and the enforcement of foreign judgments and arbitral awards on assets located in France.

Erwan also handles contractual and distribution disputes as well as product liability matters and insurance disputes, with a focus on the aviation sector.

Erwan has worked in France and in the UK and he is qualified in both jurisdictions.

* * * * - Contentieux financier, boursier et réglementaire AMF (France, ODA 2019)

"Erwan Poisson is particularly active in disputes in the banking sector, including class action cases, parallel proceedings and challenging enforcements. Interviewees say: "He is very thorough, has strong and deep analytical skills and is intellectually very robust."" CHAMBERS & PARTNERS 2019 - France (Dispute Resolution: Litigation: Elite)


‘Erwan Poisson is ‘an excellent listener’’.LEGAL 500 EMEA 2018 - DISPUTE RESOLUTION / COMMERCIAL LITIGATION

Erwan Poisson [is a] name to note” LEGAL 500 EMEA 2017 - DISPUTE RESOLUTION / COMMERCIAL LITIGATION

Professional qualifications

Solicitor of England and Wales, 2007

Admitted to the Bar, Paris, 2002

Academic qualifications

Master's degree, Private international law, University of Paris I Panthéon Sorbonne, 1999-2000

Master's degree, Dispute resolution, University of Paris II Panthéon-Assas, 1998-1999

Magister Juris (LL.M), Oxford University, 1997-1998

Degree in International and EU law, University of Paris II (Panthéon-Assas), 1996-1997

Published work

Trois questions à Denis Chemla, Erwan Poisson, Michael Young, Option Droit & Affaires, May 2013

The validity of one-way jurisdiction clauses put at risk by the French Supreme Court, PLC Dispute Resolution, November 2012 (co-written with Denis Chemla, Camille Fléchet)

Mauvais arrangement vaut mieux que bon procès, La Lettre des Juristes d'Affaire, February  2012, co-written with Augustin Doulcet

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