Collective Actions and Mass Litigation in Germany

Collective actions in Germany at a glance

Germany has no US-style opt-out class action, but collective actions are now a firm part of the litigation landscape. Since October 2023 the Consumer Rights Enforcement Act (Verbraucherrechtedurchsetzungsgesetz, VDuG) has allowed qualified consumer associations to bring redress actions for payment and model declaratory actions on behalf of large groups. Investors use the Capital Markets Model Case Act (Kapitalanleger-Musterverfahrensgesetz, KapMuG), and claim vehicles bundle assigned claims for cartel, aviation and data-protection disputes. For a company on the receiving end, the practical question is rarely whether mass claims are possible; it is which route the claimants will take and how to steer it.

The routes differ sharply. A VDuG action is opt-in: consumers must register their claims in the register kept by the Federal Office of Justice (Bundesamt für Justiz). KapMuG proceedings resolve common questions of fact and law for investors who have filed individual lawsuits. Claim aggregation through assignment uses ordinary civil procedure, but at a scale that tests the courts. Each mechanism has its own entry thresholds, timelines and settlement rules, and defence strategy must be built around the mechanism actually in play.

Redress and model declaratory actions under the VDuG

The VDuG implements Directive (EU) 2020/1828 on representative actions. Only qualified entities may sue: consumer associations on the list under the Injunctions Act that receive no more than 5% of their funds from companies, and qualified entities from other Member States registered with the European Commission (§ 2(1) VDuG). Small businesses with fewer than ten staff and annual turnover or balance sheet total of no more than EUR 2 million count as consumers (§ 1(2) VDuG), which brings many B2B relationships into scope.

Jurisdiction lies exclusively with the Higher Regional Court (Oberlandesgericht) in whose district the defendant has its general place of jurisdiction (§ 3(1) VDuG), so the action starts one instance higher than an ordinary commercial claim. The claimant must show credibly that the claims of at least 50 consumers may be affected (§ 4(1) VDuG). A redress action can seek payment of a collective total amount; if the court considers it well founded in principle, it issues a basic redress judgment (Abhilfegrundurteil) that sets out the conditions of entitlement and the evidence each consumer must provide (§ 16 VDuG).

Registration, limitation and settlement

Consumers may register claims in the class register until three weeks after the close of the oral hearing (§ 46(1) VDuG). That late cut-off means a defendant often does not know the final size of the group until the case is almost over. Registration suspends limitation for the registered claims (§ 204a(1) nos 3 and 4 of the Civil Code, Bürgerliches Gesetzbuch, BGB). A court settlement binding registered consumers cannot be concluded before the registration deadline and requires court approval (§ 9 VDuG); each registered consumer may then opt out within one month of its publication (§ 10(1) VDuG).

Implementation procedure

After a final redress judgment, a court-appointed administrator (Sachwalter) runs the implementation procedure, checks each consumer's entitlement against the criteria fixed in the judgment and distributes payments. The defendant pays the provisionally assessed costs of that procedure (§ 18(1) VDuG). For companies, this phase matters: the criteria fixed in the judgment determine how many claims ultimately succeed, so defendants should argue the entitlement conditions carefully at the merits stage. Our insight on redress actions under the VDuG covers the procedure in more detail.

Capital markets model cases (KapMuG)

Investor collective actions follow a different logic. The KapMuG applies to damages claims for false, misleading or omitted public capital market information, to claims arising from offers under the Securities Acquisition and Takeover Act and to certain crypto-asset claims under MiCAR (§ 1(1) KapMuG). Investors first sue individually before the regional courts. Any claimant may apply for a model case; if at least nine further applications on the same facts are published within six months of the first, the court refers the common questions to the Higher Regional Court (§ 7(1) KapMuG).

The Higher Regional Court opens the model case, may re-frame the declaratory objectives and appoints a lead claimant (§ 9 KapMuG). Since the 2024 reform it can also order the defendant or third parties to produce documents identified with reasonable precision, subject to a proportionality check (§ 17 KapMuG). The model decision binds the courts in all stayed cases (§ 25(1) KapMuG). A settlement approved by the court only becomes effective if fewer than 30% of the joined parties opt out (§ 21(3) KapMuG). Issuers facing an ad hoc disclosure or prospectus dispute should read our note on KapMuG model case proceedings.

Claim vehicles and litigation funding

Outside the statutory schemes, collective actions in Germany are frequently run through claim vehicles. A registered debt-collection service provider takes assignments of many individual claims and sues in its own name, financed by a commercial funder in return for a share of the proceeds.

The BGH held that this "collective action collection" (Sammelklage-Inkasso) is covered by a collection licence under the Legal Services Act (Rechtsdienstleistungsgesetz, RDG), in a case concerning claims against a former Air Berlin manager (BGH, judgment of 13 July 2021 – II ZR 84/20). The court reasoned that the collection licence also covers business models aimed exclusively or primarily at enforcing claims in court, including the bundling of many claims.

For claimants, the assignment model has clear attractions: one claimant, one set of pleadings, one court and a funder bearing the cost risk. For defendants, it raises distinct lines of attack that do not exist in a VDuG action. Each assignment must be valid under the law that governs it; the collection company must hold the necessary registration; and conflicts of interest between the funder, the collection company and the assignors may make the structure incompatible with the Legal Services Act. Courts have examined these points in detail in the cartel and aviation cases.

The Cartel Senate confirmed in the truck cartel litigation that cartel damages claims may in principle be pursued this way, but added a limit: where bundling makes effective judicial protection practically impossible in the individual case, the court may order the collection company to prepare a separation of the proceedings, and if it fails to comply the claim is abusive and inadmissible (BGH, judgment of 12 May 2026 – KZR 6/24). Defendants now have a concrete procedural tool against unmanageable bundles of thousands of claims from many jurisdictions.

Third-party funding of VDuG actions is subject to strict rules. An action is inadmissible if the funder is a competitor of the defendant, depends on the defendant, has been promised more than 10% of the defendant's payment, or is likely to influence the conduct of the case to the detriment of consumers (§ 4(2) VDuG). The claimant must disclose the source of its funds and any funding agreement (§ 4(3) VDuG). See our insight on litigation funding in Germany.

Where collective actions arise in practice

The subject matter of collective actions in Germany is broad. Typical clusters include:

• Cartel damages: follow-on claims after European Commission or Bundeskartellamt decisions, often bundled by claim vehicles; see antitrust damages and litigation.
• Data protection: claims for non-material damage under Article 82 GDPR after data incidents. The BGH decided the first case under the new lead-decision procedure in § 552b of the Code of Civil Procedure (Zivilprozessordnung, ZPO), holding that mere loss of control over personal data can be damage (BGH, judgment of 18 November 2024 – VI ZR 10/24).
• Consumer contracts: price adjustment clauses in energy, telecoms, banking and subscription contracts, and fees declared invalid.
• Capital markets: investor claims over prospectuses and ad hoc disclosures under the KapMuG.
• Product cases: defects affecting a large customer base, including the diesel litigation that shaped German mass-claims practice.

The lead-decision procedure allows the BGH to designate an appeal that raises legal questions relevant to many other proceedings as a lead case (§ 552b ZPO). Lower courts may consider staying parallel cases under § 148 ZPO while the lead case is pending, which can concentrate risk in a single appeal.

Defending collective actions: strategy and project management

Defending collective actions is as much a project-management exercise as a legal one. The first weeks set the tone. Companies should establish a single command structure linking legal, communications, finance and the business unit, secure documents and data under a legal hold, and quantify the potential exposure on the basis of a reasoned population analysis rather than headline figures in the press.

Early procedural points

• Admissibility: test the claimant's status as a qualified entity, the 50-consumer quorum, the funding disclosure and the independence of the funder (§§ 2 and 4 VDuG).
• Homogeneity: a redress action requires claims that are essentially similar; individual causation and contributory fault often argue against collective treatment.
• Parallel proceedings: map individual lawsuits, KapMuG applications and claim-vehicle actions, and seek stays where common questions are pending.
• Bundled claims: after KZR 6/24, consider applying for directions to separate unmanageable bundles.
• Applicable law: in cross-border claim bundles, the law governing each assigned claim and the validity of each assignment are fertile ground for defence.

Evidence and data

Collective proceedings put the defendant's own data at the centre of the case. Customer lists, contract versions, pricing histories and complaint logs determine who belongs to the affected group and what loss each member could have suffered. Defendants should map these data sources early, check whether data protection rules restrict their use in litigation and prepare to explain them through witnesses or experts. In KapMuG cases the new disclosure power in § 17 means internal documents may be ordered into the proceedings; privilege and confidentiality protections, including the trade-secret measures available in civil proceedings, should be planned in advance.

Settlement design

Settlements in collective actions need careful structuring: eligibility criteria, documentation requirements, payment mechanics, treatment of opt-outs and a release that holds up for registered claimants. In KapMuG cases the 30% opt-out threshold is a real risk to finality. Outside the statutory schemes, settlements with claim vehicles must address the validity of assignments and the funder's consent rights. Insurance coverage, including D&O and product liability policies, should be notified early and the insurers involved in settlement discussions.

Timeline of a VDuG redress action

1. Filing with the Higher Regional Court, with disclosure of funding (§ 4(3) VDuG) and publication of the action in the class register.
2. Written procedure and oral hearing; consumers keep registering until three weeks after the hearing closes.
3. Basic redress judgment where appropriate, then a final redress judgment, against which an appeal on points of law to the BGH lies without leave (§ 18(4) VDuG).
4. Implementation procedure run by the court-appointed administrator, including the processing of individual entitlement claims.

Collective actions and reputation, regulators and parallel claims

Collective actions rarely stay in the courtroom. Consumer associations publicise their cases, regulators may open parallel investigations, and the register is public. Statements made in one forum can be used in another, so every public communication should be reviewed for its litigation impact. Where a regulator's finding underpins a follow-on claim, such as a cartel decision, the binding effect of that finding largely decides liability, and the defence moves to causation, pass-on and quantum.

Companies with operations in several EU Member States should expect forum selection by claimant groups. Representative actions under Directive (EU) 2020/1828 exist across the EU, and Dutch, Portuguese and German proceedings may run in parallel on the same facts. Coordinating the defence across jurisdictions avoids inconsistent positions and allows the company to argue lis pendens or the binding effect of earlier decisions where appropriate. Our commercial litigation team works alongside the collective actions defence on the individual claims that inevitably follow.

How TRW & Co helps

We advise companies facing collective actions in Germany, from the first letter of a consumer association or claim vehicle to settlement or judgment. We analyse admissibility, funding and assignment structures, prepare population and exposure analyses with your finance team, and coordinate the defence across VDuG, KapMuG and individual proceedings. We draft and negotiate settlements, including eligibility rules and administration, and align litigation strategy with communications and regulatory work. For companies that are themselves claimants, for example cartel victims, we assess bundling and funding options. To discuss a matter, please contact us. This page provides general information, not legal advice; see also our disputes overview.