Class action (postępowanie grupowe)

Class action

What is a class action?

A class action, also referred to as group proceedings, is a procedural mechanism that allows a number of claimants with similar claims to pursue their rights in one court case instead of filing many separate lawsuits. In Poland, this type of proceeding is regulated primarily by the Act of 17 December 2009 on Pursuing Claims in Group Proceedings. Its purpose is to improve procedural efficiency where many persons have been affected by the same or a similar event, practice or legal relationship.

In practical terms, a class action is used when a larger group of individuals or entities has suffered comparable harm and the legal or factual basis of their claims is sufficiently aligned to justify joint examination by the court. This may concern, for example, consumers affected by unlawful contract terms, investors harmed by misleading information, or groups of persons pursuing claims arising from a defective product, an accident, or a financial institution’s conduct.

Group proceedings do not mean that every case can simply be combined into one. Specific statutory conditions must be met, including the required size of the group and an adequate degree of similarity between claims. Depending on the type of claim, the court may also assess whether the claims should be standardised in amount or whether the case qualifies only for determination of liability in principle. For that reason, the admissibility of a class action is often one of the first key issues in this type of litigation.

How does class action work in practice?

In Polish proceedings, a class action is brought by a group representative acting on behalf of all group members. The representative may be one of the claimants or, in some cases, the consumer ombudsman. The statement of claim must define the group, identify the claims covered by the proceedings and demonstrate that the statutory prerequisites for group treatment are satisfied. The court first examines whether the case may proceed as group litigation. Only after that stage does the dispute move forward on the merits.

This procedural model is intended to avoid duplication of evidence and inconsistent judgments in cases based on the same underlying facts. It can also reduce the burden on individual claimants who might otherwise consider separate litigation too costly, too time-consuming or too complex. At the same time, group proceedings are usually formal and document-heavy. They require careful preparation of the group structure, the scope of claims and the litigation strategy from the outset.

In some cases, the class action is aimed at obtaining payment. In others, the main objective is to establish the defendant’s liability, which may later facilitate individual recovery by group members. The optimal structure depends on the type of harm, the available evidence, the degree of similarity between claims and the procedural risks associated with the case.

What matters can be pursued through a class action?

Class actions are most often associated with consumer disputes, banking and financial cases, product liability, tort claims and selected business-related disputes affecting a larger number of parties in a comparable way. They may arise where many persons were exposed to the same unlawful contractual mechanism, the same misleading market communication, the same defective service model or the same event causing loss.

From a practical perspective, a class action may be relevant in matters involving unfair market practices, mass contract templates, investment product disputes, claims related to financial institutions, environmental incidents, construction defects affecting many purchasers, or widespread service disruptions causing similar damage. Depending on the legal basis, the claims may involve compensation, restitution, performance of obligations or declaratory relief.

Although class action is often perceived as a tool for consumers, entrepreneurs may also use it as claimants or face it as defendants, especially where products, services or corporate practices affect a large group in a uniform or sufficiently similar manner. For businesses, this means that litigation risk may extend beyond a single dispute and take the form of coordinated group claims with broader financial and reputational implications.

When is it worth seeking legal advice on class action?

Legal advice is worth obtaining at an early stage – both for potential claimants and for entities exposed to group claims. For claimants, the key questions usually concern whether the case qualifies for group proceedings, how the group should be formed, what documents and evidence are needed, and whether the claims should be pursued as monetary claims or as an action to establish liability. For defendants, early assessment is equally important in order to verify whether the statutory prerequisites have been met and how to respond to procedural and substantive allegations.

Prompt consultation with a lawyer may help avoid mistakes in structuring the claim, defining the group, calculating the amounts pursued or selecting the wrong procedural route. It may also reduce the risk of delays, inadmissibility challenges, fragmented litigation or avoidable financial exposure. In business practice, quick legal analysis often helps identify whether the issue should be addressed through litigation defence, settlement strategy, internal review or broader compliance and risk-management measures.

Because class actions usually involve multiple parties, extensive evidence and procedural objections at the admissibility stage, they require more than general litigation experience. They typically call for coordinated case management, clear communication with affected persons, and a strategy that takes into account procedural law, substantive law and the commercial consequences of the dispute.

Legal support in matters involving class action may include in particular:

assessment of whether the case meets the statutory conditions for group proceedings,
preparation of the litigation strategy for claimants or defendants,
support in forming the group and appointing the group representative,
analysis and organisation of evidence and claim documentation,
representation in court proceedings at the admissibility and merits stages,
evaluation of settlement options and procedural risk,
advice for businesses facing mass claims arising from products, services or contractual practices.

Need legal assistance with a class action? Contact us.