Expertise in business litigation in France | Grelier Avocat

Maître Thomas Grelier, lawyer dedicated to business litigation in Paris.

Our expertise

Thomas Grelier deals exclusively with business litigation: from negotiation to conducting trials before civil and commercial courts. A results-oriented approach, based on a tailor-made litigation strategy and rigorous legal analysis.

Our clients

The firm advises and represents French and foreign companies, executives, and partners in high-stakes business disputes. It also assists co-ownership associations (copropriétés) facing significant financial difficulties.

Non-performance

Formal notice, summary proceedings or proceedings on the merits for the purposes of enforcement, termination of the contract, and compensation for damages.

Liability of executives

Identification of management faults, assessment of causality and damage; litigation strategy and evidence management.

Sudden termination

Analysis of the lack of notice and margin, summary proceedings to resume the relationship and proceedings on the merits for compensation.

Debt recovery

Formal notice, amicable negotiation, payment order, summary proceedings or proceedings on the merits depending on the claims.

Unfair competition

Investigative measures, emergency proceedings, quantification of damages suffered, and proceddings on the merits for compensation.

Enforcement measures

Application for a protective attachment order, securing of assets, and enforcement measures with a view to effective recovery of debts.

Benefit from a first assessment

Describe your situation and objectives in a few lines to receive a personalized response.
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Maître Thomas Grelier will get back to you within 24 business hours.

Discover the firm premises

Hall d'entrée avec grand miroirs.

Cage d'escalier avec décorations en marbre.

Salle de réunion du cabinet Grelier Avocat.

Détail de la prussienne dans la salle de réunion.

Plaque Grelier Avocat dans le reflet d'un miroir trumeau.

Entrée du cabinet Grelier Avocat au 9, rue Duphot, 75001 Paris.

Latest insights from the firm

Commercial debt recovery in France: procedures, timeframes and strategy

Payment orders, interim relief proceedings, and summonses to appear in court: find out about debt recovery procedures for businesses in France.

How to prove sudden termination before French judges?

All the keys to demonstrate that your commercial partner abruptly terminated your relationship + checklist of documents to produce before French courts.

How to obtain an order for investigative measures (Art. 145 CPC)?

Obtaining an investigative measure prior to any trial in France (Art. 145 CPC): conditions, jurisdiction, limitations, and advice (+ check-list).

Hidden defects and time limits clarified by French Supreme Court

French Supreme Court clarifies time limits for hidden defects: all what you need to know about the 2-year statute of limitations and 20-year long-stop.

Class action by bondholders: conditions and admissibility of the claim

The Court of Cassation clarifies the conditions governing actions brought by the representative of the body of bondholders.

Parasitism and pre-trial evidence: what your application must contain

A poorly prepared application under Article 145 in France may be withdrawn, thereby depriving you of evidence demonstrating unfair competition.

Latest insights of the firm

How to obtain an order for investigative measures (Art. 145 CPC)?

Obtaining an investigative measure prior to any trial in France (Art. 145 CPC): conditions, jurisdiction, limitations, and advice (+ check-list).

Sales agent and competition: the principal's consent is mandatory

A sales agent cannot represent a competitor without the principal's consent. Our advice on how to protect your interests and how to react.

Sudden breach and call for tenders: details from the Court of Cassation

Discover the implications of the December 3, 2025 ruling on sudden termination when the relationship is punctuated by calls for tenders.