Marie BÉLÉZY
Attorney at the Seine-Saint-Denis Bar
Criminal law - White Collar Criminal Law
Firm
Admitted to the Bar in 2026, Marie Bélézy holds a Master’s degree (Master 2) in International and White-Collar Criminal Law from Paris Panthéon-Sorbonne University (2022) and an LL.M. from the University of Edinburgh. Excellence and an unwavering commitment are at the heart of her practice.
Fluent in both French and English, she advises and represents individuals and companies at every stage of criminal proceedings, from the investigation or judicial inquiry to pleadings before the Tribunal correctionnel [Criminal Court], the Cour d’assises [Assize Court], or the Cour criminelle départementale [Departmental Criminal Court].
After seven years of training in leading criminal defense law firms, Me Bélézy founded her own firm upon taking her oath in 2026, with the aim of providing tailored, human-centered, and determined legal defense.
Convinced that every case is unique, Me Bélézy develops a clear legal strategy and defends her clients’ rights with strength and conviction.

expertise
Tailor-Made Criminal Defense
Tailor-Made Criminal Defense
The firm provides assistance at all stages of criminal proceedings, whether you are under investigation, formally charged, or a victim, in both misdemeanor and felony cases.
Me Bélézy handles all types of criminal offenses, including:
- Felonies: murder, manslaughter, rape, terrorism, etc.
- Misdemeanors: theft, handling of stolen goods, extortion, sexual assault, drug trafficking, etc.
White-Collar Crime
Me Bélézy also practices in business criminal law, representing clients in sensitive and complex matters such as:
- Money laundering
- Fraud and breach of trust
- Misuse of corporate assets
Judicial Investigation
The firm provides assistance throughout the judicial investigation.
- Attend interviews, confrontations, and reconstructions
- File procedural requests: expert reports and counter-expert reports
- Challenge pre-trial detention through applications for release
- Raise procedural irregularities through motions to dismiss
Police Interviews & Police Custody
Defense at Every Stage of the Proceedings
Why be assisted by a lawyer ?
- To ensure your fundamental rights are respected
- To prepare your defense even before the first interview
- To avoid missteps with serious consequences
Representation before the Criminal Court
Immediate Trial & Summons Hearings
Immediate Trial: Emergency Defense and Full Responsiveness
As an exception to the usually lengthy judicial process, immediate appearance proceedings take place following police custody. The accused is tried immediately after being brought before the prosecutor.
The firm provides urgent assistance with the aim of:
- Quickly gathering documents useful to the defense
- Effectively preparing you for the hearing
- Ensuring a responsive, structured, and human defense
Summons Hearings: Anticipation & Personalized Strategy
When you are summoned to appear before the court at a later date, Me Bélézy undertakes thorough preparation, including :
- Detailed review of the criminal case file
- Preparation meetings at the firm
- Development of a tailored defense strategy
Actualités juridiques
Découvrez les derniers développements dans le domaine du droit
A dedicated and determined defense strategy
Assize Court Dedicated Defense in the Most Serious Cases
- The Cour criminelle départementale [Departmental Criminal Court]
- The Cour d’asssies [Assize Court]
- The Cour d’assises des mineurs [Juvenile Assize Court]
A dedicated and determined defense strategy
Building a coherent and robust defense strategy
Conducting multiple preparation meetings, including in detention
Examining every piece of evidence with precision
Supporting you with attentiveness, humanity, and determination up to the hearing
Fees
- Flat fee (preferred): a global amount agreed in advance for the entire representation
- Hourly rate: services billed based on an hourly rate agreed upon with the client; each invoice is accompanied by a detailed statement of work performed
- Success fee (in certain cases): an additional fee may be agreed upon, with a fee agreement expressly specifying the percentage applied to the compensation obtained or the savings achieved in the case