Unfair competition under French law: forms, proof, and remedies

Definition: three conditions, one legal basis French law does not have a statute listing the behaviours constituting unfair competition. It is a judge-made construct: the courts determine case by case whether conduct crosses the line. The reference text is Article 1240 of the Civil Code: “Any act whatever of a person which causes damage to […]

Published on 21 avril 2026 · Updated on 21 avril 2026

Definition: three conditions, one legal basis

French law does not have a statute listing the behaviours constituting unfair competition. It is a judge-made construct: the courts determine case by case whether conduct crosses the line. The reference text is Article 1240 of the Civil Code: “Any act whatever of a person which causes damage to another obliges the person by whose fault it was caused to make reparation.” Complemented by Article 1241, which imposes liability for mere imprudence or negligence, this basis means that unfair competition does not require intent to harm. An entrepreneur who launches a product without checking that it does not create confusion with an existing competitor may be held liable, even absent any intention to cause harm.

An action for unfair competition requires three cumulative conditions: a fault (conduct contrary to the fair usages of commerce), damage (material, commercial, or moral), and a causal link between the two. These three conditions must be proved by the claimant – except in the case of disparagement, where the Cour de cassation now presumes damage (see below).

Freedom of competition and its limits

Freedom of trade and industry, inherited from the Allarde Decree of 2-17 March 1791 and recognised by the Constitutional Council, authorises everyone to seek to attract the customers of their competitors. No one owns their customer base. Losing it to a more efficient or cheaper rival does not constitute a fault.

This freedom has a limit: fair dealing. Competition must conform to the honest usages of commerce. Without this requirement, businesses would hesitate to invest or innovate, since their efforts could be copied or discredited with impunity. It is to preserve a fair business environment that the law sanctions conduct exceeding the bounds of normal competition. The dividing line is never absolute – it depends on the sector, the nature of the practices, and the degree of proximity between the businesses.

The four forms of unfair competition

Case law has identified four broad categories of unfair conduct. This classification is not exhaustive – any method contrary to commercial fair dealing may be characterised as a fault – but it constitutes the analytical framework used by the courts.

Confusion: creating the risk of mistaken identity

Confusion consists in creating, in the mind of customers, a risk of mistaken identity between two businesses, their products, or their services. The aim, conscious or not, is to capture a competitor’s customers by giving the impression that one is that competitor or offers the same products.

The methods are varied: imitation of a trade name, reproduction of distinctive visual elements (logo, branding, website design), similar packaging, use of a similar domain name. The assessment is global, considering all reproduced elements and the overall impression they create for the averagely attentive consumer.

The Cour de cassation confirmed in a decision of 4 June 2025: the court must ascertain whether the reproduction of elements, considered as a whole, was likely to create a risk of confusion in the mind of the public. Elements which, taken individually, are not protectable may nonetheless constitute a fault where their combination produces a misleading overall impression (Cass. com., 4 June 2025, No. 24-10.219). The mere risk of confusion suffices: it is not necessary to demonstrate that a mistake actually occurred.

Disparagement: discrediting a competitor

Disparagement (denigrement) consists in disseminating information likely to discredit the products, services, or offerings of an identifiable competitor, whether that information is true or false.

Four elements characterise actionable disparagement. Critical or negative statements, first, targeting the business, its directors, or its products – regardless of whether the criticism is well-founded. Publicity, second: the statements must be disseminated beyond a restricted private circle, on any medium (social media, client circulars, trade fairs, oral statements). Identification of the target: the competitor must be identifiable, even if not named. Finally, a tortious character: excessive, tendentious statements, or those aimed primarily at causing harm rather than providing objective information.

The argument “but it is true!” does not suffice to escape liability. Unlike defamation, which protects the honour of a natural person, commercial disparagement may be established even where the information disseminated is accurate, provided it is presented in a tendentious manner or with the aim of causing harm.

The Cour de cassation considerably lowered the burden of proof for damage in a decision of 26 June 2024: dissemination, even to a single client, of information likely to discredit a competitor’s products constitutes disparagement. Damage – even if only moral – is now necessarily inferred from such an act, without the victim needing to demonstrate it (Cass. com., 26 June 2024, No. 23-11.020).

Disruption: interfering with a competitor’s operations

Disruption (desorganisation) targets acts that disturb the internal functioning of a competing business or, more broadly, the market itself. It takes two main forms.

Poaching of staff is the most frequent. Hiring a competitor’s employee is not, in itself, disloyal – freedom of employment permits it. Poaching becomes tortious where it is accompanied by unfair manoeuvres: systematic and targeted solicitation of key staff, offers accompanied by requests for disclosure of trade secrets, mass hiring designed to paralyse the competitor’s activity. The Cour de cassation held that the poaching of 11 out of 22 employees constituted tortious mass poaching, even where the employees had been released from their non-competition undertakings (Cass. com., 13 April 2023, No. 22-12.808).

Misappropriation of confidential information constitutes a second form. The Cour de cassation held that the holding or appropriation of confidential information belonging to a competing company, brought in by a former employee – even one not bound by a non-competition clause – constitutes unfair competition (Cass. com., 17 May 2023, No. 22-16.031).

Disruption may also result from breach of regulations: illegal practice of a regulated profession, non-compliance with health or environmental standards, systematic resale at a loss. A business that disregards rules observed by its competitors gains an undue advantage that distorts competition.

Economic parasitism: free-riding on another’s efforts

Economic parasitism (parasitisme) denotes conduct by which an operator positions itself in the wake of another to unduly profit from their efforts, know-how, acquired reputation, or investments, without having to fund them.

The Cour de cassation clarified this definition in a decision of 26 June 2024, rendered in section formation: parasitism is a form of disloyalty within the meaning of Article 1240 of the Civil Code, and the victim must identify the individualised economic value they invoke – know-how, reputation, or a creative investment whose fruits the parasite has appropriated (Cass. com., 26 June 2024, No. 22-17.647). In a decision rendered the same day, the Court specified that this value cannot be inferred from the mere longevity and commercial success of a product, ideas being in the public domain: adapting a concept does not, in itself, constitute parasitism (Cass. com., 26 June 2024, No. 23-13.535).

A distinctive feature of parasitism: it does not require a competitive relationship between the parties. An economic operator may engage in parasitic behaviour towards a business operating in a totally different sector.

Proving unfair competition

Between the conviction of being a victim and the ability to demonstrate it before a court, there is often a gap. The action rests on three cumulative conditions – fault, damage, causal link – and each must be established.

Fault and modes of proof

Fault is assessed case by case, taking into account the usages of the sector, the degree of proximity between the businesses, the nature of the practices, and whether they are systematic or isolated.

Available modes of proof deserve particular attention. Reports by commissaire de justice allow a situation to be “frozen” at a given moment: disparaging advertising on a website, shop layout creating confusion, sale of imitated products. These reports carry strong evidential weight. Witness statements and attestations from customers who were misled or former employees may be useful, provided they are obtained lawfully. Written documents – advertisements, brochures, emails, timestamped screenshots – constitute proof in digital matters, which are particularly volatile: their rapid preservation is indispensable.

Finally, and often the most effective route: pre-trial investigative measures under Article 145 of the Code of Civil Procedure. If you suspect disloyal acts but lack direct evidence, you may ask the court – even before commencing proceedings on the merits – to order conservatory measures to obtain them: appointment of an expert, report by commissaire de justice at the competitor’s premises, seizure of computer documents. A legitimate interest (serious and plausible suspicions) must be demonstrated, and the measure must be proportionate.

Damage: three categories to distinguish

Having proved the fault is not enough. Three categories of damage must be distinguished.

Direct material damage is the most obvious: loss of turnover, reduced margins, lost contracts directly attributable to the disloyal acts. It is often the easiest to quantify, but not always the most significant in a case of disparagement or parasitism.

Commercial disruption encompasses more diffuse harm: damage to brand image, trivialisation of products, internal disruption of the victim business, loss of opportunity. It is recognised even in the absence of quantifiable loss of turnover.

Moral damage is recognised for legal persons – the Cour de cassation regularly confirms this. In disparagement cases, it is even irrebuttably presumed: no specific proof is required (Cass. com., 26 June 2024, No. 23-11.020).

Bringing proceedings: the action for unfair competition

Which court to seize?

The Commercial Court (Tribunal de commerce) has jurisdiction for disputes between traders, under Article L. 721-3 of the Commercial Code. If one party is not a trader, the tribunal judiciaire has jurisdiction. It also has jurisdiction where the unfair competition action is connected to a counterfeiting action, as the latter falls within a specialised court.

For territorial jurisdiction, Article 46 of the Code of Civil Procedure offers the choice between the court of the defendant’s domicile, the court of the place of the harmful act, and the court of the place where the damage was suffered.

Urgent measures and conservatory measures

Where disloyal acts are manifest, the victim may apply to the interim relief judge (juge des referes) for immediate cessation of the acts, without awaiting the outcome of proceedings on the merits. Urgency and the absence of serious dispute (or the existence of a manifestly unlawful disturbance) are the required conditions. An order subject to a periodic penalty payment (astreinte) may be pronounced, giving the injunction real coercive force.

Limitation: five years

The action for unfair competition is subject to a five-year limitation period running from the day the victim knew or should have known the facts enabling exercise of the action (Article 2224 of the Civil Code). This period runs from knowledge of the initial facts, even if the disloyal acts continue. Vigilance is essential: a business that allows the period to lapse without acting is definitively deprived of its action, even if the conduct has continued.

Sanctions and remedies

A successful action leads to three types of remedy.

Damages constitute the principal sanction. The court awards full reparation of the loss: material damage (lost turnover, lost contracts), commercial disruption (damage to image), and moral damage. The Cour de cassation specified in a decision of 9 April 2025 that moral damage is irrebuttably presumed in cases of unfair competition, and that the court may use the unjust advantage method for assessment – in other words, setting damages at the level of profit made by the author of the disloyal acts (Cass. com., 9 April 2025, No. 23-22.122). This development is significant: it allows substantial awards even where direct loss is difficult to quantify.

Injunctions to cease the disloyal acts, subject to periodic penalty payment, provide not only reparation for the past but also a guarantee for the future.

Publication of the judgment, at the expense of the losing party, in professional journals or publications constitutes a supplementary sanction, particularly effective where damage to reputation is the principal component of the loss.

Unfair competition and counterfeiting: not to be confused

Counterfeiting (contrefacon) sanctions infringement of an intellectual property right – registered trade mark, patent, registered design, copyright. It requires the existence of a valid and enforceable title. Unfair competition sanctions a fault in the exercise of competition, independently of any intellectual property protection. It is available to a business that has not taken care to register its distinctive signs.

The two actions may be combined in the same proceedings – and frequently are, particularly in confusion cases. But the Cour de cassation requires that the two claims rest on distinct facts: one cannot reproach exactly the same thing under two different legal characterisations. If the facts founding the unfair competition action are identical to those founding the counterfeiting claim, the complementary claim will be dismissed (Cass. com., 23 June 2021, No. 19-18.111).

In practice, this means the counterfeiting action will focus on the slavish reproduction of a protected trade mark or design, while the unfair competition action may target unprotected elements – trade name, general branding, trade dress – provided their reproduction creates a misleading overall impression. Our commercial law practice page details the firm’s modes of intervention in these matters.

Legal sources and references

Legislation

Article 1240 of the Civil Code – foundation of tortious liability
Article 145 of the Code of Civil Procedure – pre-trial investigative measures
Article L. 721-3 of the Commercial Code – jurisdiction of Commercial Courts
Article 46 of the Code of Civil Procedure – territorial jurisdiction
Article 2224 of the Civil Code – five-year limitation period

Case law

Cass. com., 26 June 2024, No. 23-11.020 – disparagement to a single client suffices; damage necessarily inferred
Cass. com., 13 April 2023, No. 22-12.808 – mass poaching
Cass. com., 12 January 2022, No. 20-11.139 – breach of regulations constitutes unfair competition
Cass. com., 23 June 2021, No. 19-18.111 – distinct facts required for cumulation with counterfeiting

Frequently asked questions about unfair competition under French law

What are the 4 types of unfair competition in French law?

The classification by Doyen Roubier, adopted by the Cour de cassation, traditionally distinguishes three categories of disloyal practices: confusion (imitation of distinctive signs, products, or commercial appearance), disparagement (dissemination of statements or information aimed at discrediting a competitor), and disruption (mass poaching of staff, misappropriation of trade secrets, internal disruption of a rival business). Case law has added a fourth category, now fully integrated: parasitism, which consists in positioning oneself in the wake of an economic operator to profit, without spending anything, from their efforts and know-how (Cass. com., 26 June 2024, No. 23-13.535).

What are the 3 conditions for unfair competition under French law?

The action for unfair competition rests on Article 1240 of the Civil Code and requires three cumulative conditions. First, a fault: conduct contrary to the fair usages of commerce, assessed objectively, without the need to demonstrate intent to harm. Second, damage: the Commercial Chamber has held since a decision of 12 January 2022 (No. 20-11.139) that “damage is necessarily inferred from an act of unfair competition, generating commercial disruption, even if only moral”. Third, a causal link between the fault and the damage suffered. The courts are pragmatic on this last point: where the fault is established, the causal link is often presumed.

How do you prove unfair competition?

Proof of unfair competition is free and rests on a bundle of converging evidence (Cass. com., 4 February 2014, No. 13-11.044). In practice, reports by commissaire de justice are the preferred tool for freezing a situation at a given moment: reproduction of packaging, customer poaching, copying of a website. Timestamped screenshots, witness statements from clients or suppliers, comparisons of turnover before and after the alleged acts, invoices, and accounting documents are all admissible. For parasitism, the Cour de cassation has required since 2024 the demonstration of an “identified and individualised economic value” (Cass. com., 26 June 2024, No. 23-13.535). Lack of structured evidence remains the primary cause of failure of these actions.

Which court has jurisdiction for unfair competition in France?

Jurisdiction depends on the status of the parties. Between traders, the Commercial Court is the natural forum (Cass. com., 27 March 2001, No. 99-11.320). If the dispute is between a trader and a non-trader, the non-trader has an option: they may sue before the Commercial Court or the tribunal judiciaire; however, they can only be sued before the tribunal judiciaire. Where unfair competition is connected to a patent or trade mark counterfeiting action, exclusive jurisdiction lies with the specially designated tribunal judiciaire (Arts. L. 615-17 and L. 716-3 Intellectual Property Code).

What sanctions are available for unfair competition?

The court has a broad arsenal. On the civil side, it may order cessation of the disloyal acts subject to periodic penalty payment, award damages compensating the loss suffered (loss of customers, damage to image, commercial disruption), and order publication of the judgment at the losing party’s expense. The Cour de cassation admits compensation for moral damage, including in the absence of demonstrable turnover loss (Cass. com., 12 January 2022, No. 20-11.139). In parallel, certain acts of unfair competition may receive a criminal characterisation, notably on the basis of misleading commercial practices (Art. L. 121-1 Consumer Code) or the offence of breach of trust. The action is subject to a five-year limitation period from the manifestation of the damage (Art. 2224 Civil Code).

What is parasitism in French competition law?

Parasitism consists, for an economic operator, in “positioning itself in the wake of a business by unduly profiting from the investments made or its reputation” (Cass. com., 4 February 2014, No. 13-11.044). Unlike other forms of unfair competition, parasitism does not require a direct competitive relationship between the parties (Cass. com., 15 November 2011, No. 10-25.473). It may target the reproduction of intellectual concepts, slavish copying of products, or exploitation of a brand image. The Commercial Chamber has, however, set an important limit: the victim must prove the existence of an “identified and individualised economic value” resulting from investments or creative efforts (Cass. com., 26 June 2024, No. 23-13.535). The mere commercial longevity of a product does not suffice (Cass. com., 5 July 2016, No. 14-10.108).

What is the difference between unfair competition and counterfeiting?

Counterfeiting sanctions the infringement of an intellectual property right (patent, trade mark, copyright); it requires the existence of a protected title. Unfair competition, based on Article 1240 of the Civil Code, sanctions tortious conduct on the market independently of any proprietary right. The two actions are subject to distinct regimes: counterfeiting falls within specialised courts, while unfair competition may be brought before the Commercial Court between traders. Cumulation is possible where distinct facts justify it (Cass. com., 27 May 1981, No. 79-15.183): for example, counterfeiting of a model accompanied by abnormally low prices intended to create additional confusion. In the absence of an intellectual property title, unfair competition remains the sole remedy against imitation.

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