2014
Year the action de groupe was introduced by the loi Hamon (Law 2014-344 of 17 March 2014), completing France's consumer protection toolkit after decades of debate.
Opt-in
The French system requires each consumer to expressly join the group to be compensated — unlike the American opt-out class action, where silence means inclusion.
17
Nationally approved consumer associations currently eligible to bring a class action; each must have at least 10,000 members to qualify for national-level approval.

Origins: Why France Needed a New Tool

The action de groupe was created by the loi relative à la consommation of 17 March 2014 (Law 2014-344, known as the loi Hamon after its sponsor, then Minister of Consumer Affairs Benoît Hamon). It filled a genuine gap in French consumer enforcement: the earlier action en représentation conjointe, introduced in the 1990s to allow associations to act for multiple consumers, had seen very limited use because it required prior written mandates from each individual victim — a logistically demanding condition that made it unsuitable for mass harm cases. The action de groupe dispenses with this requirement entirely: the association acts for a group that has not yet been identified when proceedings begin, without any mandate from the consumers it will eventually represent.

The introduction of the action de groupe completed a legislative evolution that had been building since the 1970s: individual civil party action (Art. L 621-1), preventive clause removal (Art. L 621-7), joint representation with mandates (Art. L 622-1), and now a genuine group action for mass consumer harm. As of April 2024, a further reform of the class action framework remained under parliamentary discussion.

Opt-In, Not Opt-Out: The Fundamental Design Choice

France — Opt-In System Action de groupe, Art. L 623-1 et seq. C. consom.
✓Consumer must expressly join the group within the court-set adhesion window (2–6 months after completion of consumer information measures)
✓Only consumers who join are bound by the judgment and entitled to compensation
✓A consumer who does not join can still bring their own individual action (provided prescription has not run)
✓Any contractual clause preventing a consumer from participating in a class action is deemed non-written (Art. L 623-32)
~In practice, consumer participation rates can be low — awareness campaigns and ease of adhesion are critical to the action's effectiveness
USA — Opt-Out System The class action model France chose not to adopt
•All consumers in the defined class are automatically included unless they expressly opt out
•Silence means inclusion in the class and binding by the judgment
•Potentially very high participation rates — driven by the default inclusion mechanism
•Can produce much larger aggregate damages exposure for defendants
•French legislature deliberately rejected this model in favour of the less expansive opt-in approach

Who Can Bring an Action de Groupe

Only approved national-level consumer associations may initiate an action de groupe (Art. L 623-1, al. 1). To hold national-level approval, an association must have at least 10,000 members (Art. R 811-1). Seventeen associations currently hold this qualification.

Although the statutory text refers to "an" association, the implementing regulations make clear that multiple associations can jointly initiate the same action de groupe for the same breaches by the same professional (Arts. R 623-7 and R 623-18). This means that the largest consumer organisations can combine their resources and expertise in a single set of proceedings, substantially increasing the pressure on the defendant business.

The Association Acts Without Mandate

One of the defining features of the action de groupe — and the key difference from the action en représentation conjointe — is that at the moment proceedings begin, the association has received no mandate from any consumer. The group whose interests it is defending does not yet exist: it will be defined by the court's first judgment. This exception to the French procedural principle of nul ne plaide par procureur was one of the most debated aspects of the law's introduction.

Association Substitution

If an association initiating an action de groupe becomes unable to continue (through dissolution, change of objects, or loss of approval), any other approved consumer association may ask the court at any time to be substituted in its place (Art. L 623-31). The substitution carries over the mandates given by consumers and obliges the failing association to transfer all relevant documents and funds to the replacing association.

What Breaches Are Covered

The action de groupe targets a broad range of professional failures. The statutory definition (Art. L 623-1, al. 1) covers:

Scope 1 Legal Obligations Breach of legal obligations — whether or not those obligations derive from the Code de la consommation. The action can be based on obligations from the Code civil, including product liability (Arts. 1245 et seq.) and the guarantee against latent defects (Arts. 1641 et seq.). TJ Versailles, 4 June 2020, n° 15/10221 (hidden defects confirmed in scope)
Scope 2 Contractual Obligations Breach of contractual obligations — any obligation the professional undertook in a contract with the consumer. This covers failure to deliver, non-conformity, late delivery, abusive pricing, defective digital services, travel contract failures, and any other contractual breach causing harm to a group of consumers in a similar or identical situation.
Scope 3 Sector Coverage Breaches committed in connection with the sale of goods, the provision of services, and the rental of immovable property (Art. L 623-1, al. 1). This covers the full range of B2C relationships: retail sales, subscriptions, financial services, utilities, telecoms, transport, hospitality, and residential leasing.

What the Action Cannot Do

The action de groupe is limited to the compensation of individual patrimonial damage (material harm) (Art. L 623-2). Moral harm and personal injury are expressly excluded. The action cannot be used to seek the cessation of the harmful practice — that remedy must be sought through the cessation action under Arts. L 621-2 or L 621-7. No legal persons may participate: only individual consumers (natural persons) can be members of the group.

The "Similar Situation" Requirement Is Flexible

The statute requires consumers to be in a "similar or identical situation" with the same common cause of harm. The group can consist of consumers in a merely similar (not strictly identical) situation, and it is not necessary that the damages suffered be exactly identical across all members (TJ Versailles, 4 June 2020, n° 15/10221). The court, not the association, ultimately fixes the perimeter of the group (Art. L 623-4). There is no minimum number of consumers specified: theoretically two consumers in a similar situation is sufficient to form a group.

The Court: Tribunal Judiciaire, Mandatory Representation

The action de groupe falls within the exclusive subject-matter jurisdiction of the tribunaux judiciaires (Art. L 211-9-2 Code de l'organisation judiciaire), regardless of the value of the claim. The territorially competent court is the one located at the defendant's place of residence (Art. R 623-2, al. 1). Where there are multiple defendants, the association may choose any court with jurisdiction over one of them. Where the defendant resides abroad or has no known domicile, the tribunal judiciaire de Paris has jurisdiction (Art. R 623-2, al. 2). Legal representation by an avocat is mandatory for both parties (Art. R 623-4).

The Six Steps of the Action de Groupe

1
Summons (Assignation) with Individual Cases The association initiates proceedings by serving a summons on the professional(s). The summons must include an express statement of the individual cases presented in support of its action. These individual cases allow the court to assess the professional's liability and the nature of the harm. A copy of the association's approval order must be attached. The filing of the summons immediately suspends the prescription of individual consumers' actions for the same harm. The prescription clock restarts for a minimum of six months after the judgment or the homologation of a mediation agreement (Art. L 623-27). Arts. L 623-1, al. 1; R 623-3, al. 1; R 623-18 — Prescription suspension: Art. L 623-27
2
First Judgment: Liability, Group Definition, Damages Framework The court's first judgment addresses, all in the same decision: the professional's liability; the definition of the group and the criteria for membership; the harm categories and their amounts (or the elements needed for assessment); the information measures required to reach potential group members; the adhesion window and modalities; and the compensation conditions and deadlines. Publication of the first judgment can only take place after all ordinary appeals and the pourvoi en cassation have been exhausted (except in competition-related class actions). Arts. L 623-4 to L 623-13; R 623-8
3
Consumer Information Campaign Once the first judgment is no longer subject to ordinary challenge, the professional must implement the court-ordered information measures at their own expense, within the deadline fixed by the judgment. If the professional fails to act, the association implements the measures, still at the professional's expense. The information must include the device of the judgment, adhesion contact details and form, the adhesion deadline, and the warning that non-adhesion extinguishes the class action claim. Art. L 623-7; R 623-7; R 623-16
4
Adhesion Window: Consumers Join the Group Each consumer who has suffered the harm defined by the court must expressly join the group within the adhesion window fixed by the judgment: not less than two months and not more than six months after the completion of the information campaign. Adhesion constitutes a mandate to the association for indemnification purposes. A consumer who fails to join within the window cannot seek indemnification through the class action (Art. R 623-17). No clause can prevent a consumer from joining; any such clause is deemed non-written (Art. L 623-32). Arts. L 623-8, L 623-9, L 623-32; R 623-17 — Adhesion window: 2 to 6 months
5
Compensation of Adhering Consumers The professional compensates each consumer who has joined the group within the conditions, limits, and deadlines fixed in the first judgment. All sums received by the association for consumers must be deposited at the Caisse des dépôts et consignations (Art. L 623-10). The professional bears all enforcement recovery costs (Art. L 623-21). Arts. L 623-10 to L 623-11, L 623-18, L 623-21; R 623-23 to R 623-25
6
Second Judgment: Unsatisfied Claims or Extinction After the indemnification deadline, the court renders a second judgment. If unsatisfied compensation claims have been referred back to it, it rules on all of them in a single decision. If no unsatisfied claims remain, it declares the proceedings extinguished (Arts. L 623-19, R 623-26, R 623-27). If the professional fails to execute the second judgment voluntarily, the association represents the non-compensated consumers in enforcement proceedings. Arts. L 623-19 to L 623-21; R 623-26 to R 623-29

The Prescription Suspension Effect: An Immediate Consequence of Filing

From the moment the action de groupe summons is filed, the prescription period for every individual consumer's claim for the same harm against the same professional is suspended (Art. L 623-27). Once the first judgment is rendered or a mediation agreement is homologated, prescription restarts for a minimum of six months. This means that consumers who were approaching the end of their individual prescription period gain a reprieve the moment the association files — even before any group is defined and without any action on their part.

The practical consequence for businesses is significant: the filing of a class action summons against them effectively revives or extends the limitation exposure for an entire category of consumer claims simultaneously, not just for the individual consumers who ultimately join the group.

The Bar on Duplicate Actions

Once a judgment or a homologated mediation agreement has been reached in an action de groupe based on the same facts, the same breaches, and the same harm, any further action de groupe on the same basis is inadmissible (Art. L 623-30). This rule also prevents the same association from repeating litigation it has already concluded. It does not, however, prevent individual consumers from pursuing their own independent actions for harm not covered or not compensated within the class action.

What the Two-Judgment Structure Means for Businesses

The action de groupe's two-judgment architecture is particularly burdensome for defendant businesses. The first judgment — which determines liability and sets the framework for all compensation — cannot be fully executed until the appeals process is exhausted and the consumer information campaign is complete. The group is then progressively constituted over a multi-month adhesion window. The business must then process each individual compensation claim within the court-set deadlines or face a second judicial round. Early in the first-instance proceedings, it is therefore worth assessing whether a negotiated resolution — including via mediation, which is expressly contemplated by Arts. L 623-22 et seq. — would produce a better outcome than litigating through to a second judgment.

What Every Business Selling to French Consumers Needs to Know
Any business selling goods, providing services, or renting property to French consumers is within scope of the action de groupe, provided the breach affects a group of consumers in a similar or identical situation caused by the same professional conduct.
The action can be based on any legal or contractual obligation — not just the Code de la consommation. This includes product liability under Arts. 1245 et seq. C. civ. and the guarantee against latent defects under Arts. 1641 et seq. C. civ.
Only patrimonial (material) harm is compensable: moral harm and personal injury are excluded. The action also cannot order the cessation of a harmful practice — that requires a parallel cessation action under Arts. L 621-2 or L 621-7.
The association acts without any prior consumer mandate, representing a group not yet defined when proceedings begin. The court, not the association, ultimately fixes the group's perimeter.
There is no minimum number of consumers: in theory two consumers in a similar situation suffice, though in practice associations bring the action for significant mass-harm situations.
Multiple approved associations can jointly bring the same action de groupe — this is not limited to one association per case.
Filing of the summons immediately suspends the individual prescription of all consumers potentially affected, even before they know the action exists.
Any clause in a consumer contract attempting to prevent participation in a class action is automatically deemed non-written (Art. L 623-32) — these clauses cannot be used as a shield.
The opt-in structure limits financial exposure compared to an opt-out system, but the combination of mandatory consumer information campaigns, the adhesion window, and the potential second-judgment stage makes the total duration of proceedings very long — often several years.
Mediation is expressly available at any stage of the proceedings and should be considered early, given the cost and duration of the two-judgment structure.
Could Your Business Be Exposed to a French Class Action?

The action de groupe is increasingly active in French consumer litigation, particularly in telecoms, financial services, digital platforms, and consumer goods. Understanding its scope, the standing requirements, and the six-stage procedure is the foundation of any effective risk assessment.

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This article is for general information and educational purposes only. It does not constitute legal advice. The information reflects the state of the law as updated to April 2024 in the source text; a legislative reform of the action de groupe framework was at that date still under parliamentary discussion. Always seek qualified legal advice for your specific situation.