How to Bring a Product Liability Claim in Switzerland (step‑by‑step, 2026)

If you have been injured or suffered property damage because of a defective product sold in Switzerland, you are entitled to pursue compensation, but the process demands careful preparation, strict adherence to limitation periods, and the right legal basis from the outset. This guide explains, step by step, how to bring a product liability claim in Switzerland under the rules in force in 2026, covering the Swiss Product Liability Act (PrHG), the Code of Obligations (OR), and the practical implications of the EU Revised Product Liability Directive (Directive (EU) 2024/2853) for cross‑border cases.

Whether you are an injured consumer, an in‑house counsel at an SME, or a product safety manager assessing litigation readiness, this article sets out the eligibility requirements, documents needed, timeline, costs, and common pitfalls you should know before filing.

Overview of the Product Liability Process and Who It Applies To

Product liability in Switzerland rests on three parallel legal bases. Understanding which route, or combination of routes, applies to your situation is the first decision point in any claim.

• PrHG (Produktehaftpflichtgesetz, SR 221.112.944), strict liability. The manufacturer (or importer into Switzerland) is liable for damage caused by a defect in the product, without the claimant needing to prove fault. A product is considered defective under Art. 4 PrHG if it does not provide the safety that the public at large is entitled to expect, taking into account all circumstances including its presentation, reasonably foreseeable use, and the time it was put into circulation.
• Contractual claims under the Code of Obligations (OR). Where a direct contractual relationship exists between the claimant and the seller, warranty and sales‑law remedies (OR Art. 197 ff.) may apply. These require proof of a contractual defect and timely notice.
• General tort liability (OR Art. 41 ff.). A fault‑based claim can be brought against any person whose negligent or intentional act caused the damage. This route requires proving fault, which can be harder, but it is not subject to the same product‑specific limitations.

Any person who has suffered personal injury or property damage may bring a claim. Insurers who have indemnified an injured party may also pursue subrogated claims. In practice, many claimants plead both the PrHG strict‑liability route and the general tort route in the alternative, ensuring the broadest possible basis for recovery. The Swiss Federal Supreme Court has confirmed the parallel applicability of these regimes in its case law.

Eligibility and Prerequisites for a Product Liability Claim in Switzerland

Before filing, you must confirm that your situation meets the legal requirements under at least one of the three routes outlined above. The following prerequisites apply.

Under PrHG (strict liability):

• The item must qualify as a “product” within the meaning of Art. 3 PrHG, any movable item, including electricity and component parts, whether raw or processed.
• The product must be “defective” (Art. 4 PrHG), it does not provide the safety that can legitimately be expected.
• The claimant must demonstrate damage (personal injury or damage to an item of property other than the defective product itself) and a causal link between the defect and the damage.
• The defendant must be the manufacturer, producer of a component part, or the importer of the product into Switzerland (Art. 2 PrHG).

Under OR (contract or tort):

• For contractual claims: a valid sale or supply contract, proof of a defect covered by warranty rules, and timely notice of the defect to the seller.
• For tort claims: proof of fault (negligence or intent) on the part of the responsible party, damage, and causation.

In all cases, you should identify the product (including serial and model numbers), preserve the defective item, secure medical evidence of any injuries, and, if insured, notify your insurer promptly.

When to consider alternative routes

Not every product‑liability dispute requires court proceedings. Before filing a claim, assess whether a negotiated settlement, product recall, or administrative complaint to the competent authority under the Product Safety Act (PrSG, SR 930.11) may resolve the issue faster or in parallel. An administrative complaint can trigger regulatory investigation, inspection, and mandatory recall, outcomes that may strengthen a subsequent civil claim or make litigation unnecessary.

Step‑by‑Step Procedure: How to Bring a Product Liability Claim in Switzerland

The product liability procedure in Switzerland follows a sequence of five core stages. Each is set out below with the responsible actors, key actions, and tactical guidance.

Step 1, Immediate preservation and safety actions

Who acts: Claimant, safety manager, treating clinician.

The single most important action after an incident is to preserve the evidence. Once the defective product has been altered, repaired, discarded, or returned to the manufacturer, the foundation of the claim may be irretrievably weakened.

Take the following steps immediately:

1. Secure the product in its current state, do not attempt to repair, disassemble, or dispose of it.
2. Photograph the product, any visible damage, the packaging, and the labelling (including serial and model numbers, batch codes, and barcodes) from multiple angles.
3. Record the date, time, and location of the incident in writing.
4. Obtain a medical report documenting all injuries and, where possible, requesting the treating physician’s opinion on the causal link to the product.
5. Identify and log the contact details of any witnesses.
6. Notify your insurer if required by the terms of your policy, but avoid making statements that could be construed as admissions of fault or contributory negligence.
7. If the product contains software or firmware, preserve any available logs, screenshots, or error messages before the device is powered off or reset.

Tactical tip: Store the product in a secure, documented location. A clear chain of custody, showing who had access to the product and when, will be critical when expert evidence is introduced later in proceedings.

Step 2, Early case assessment and instructing an expert

Who acts: Claimant, legal counsel, independent technical expert.

Once evidence is preserved, instruct experienced product liability counsel. The lawyer’s first task is to assess the claim’s viability by reviewing:

• Which legal basis (PrHG, OR contract, OR tort) is strongest.
• Which court has jurisdiction, typically the domicile of the defendant or the place where the damage occurred.
• Whether the limitation period has started running (see timeline section below).
• Whether interim measures (such as a court‑ordered preservation of evidence) are necessary.

At this stage, appoint an independent technical expert. The expert’s role is to inspect the product, establish the nature and cause of the defect, and prepare a preliminary report on causation. Choose a specialist whose discipline matches the product category, mechanical engineer for machinery, electrical or firmware specialist for electronic devices, or a software forensics expert for connected products.

Collect all available technical documents: user manuals, safety instructions, maintenance records, software update logs, test reports, and any recall notices or safety alerts published by the manufacturer or a regulatory authority under the PrSG. These documents will form the backbone of the expert’s analysis and the statement of claim.

Tactical tip: If there is a risk that the manufacturer may destroy or alter evidence in its possession (such as production records, quality‑control data, or software source code), counsel should consider applying to the court for a provisional measure to preserve evidence before the main claim is filed.

Step 3, Pre‑action engagement, ADR and demand letter

Who acts: Claimant’s counsel.

Before filing a court claim, send a formal pre‑action letter of claim (Aufforderungsschreiben) to the manufacturer or importer. The letter should summarise the facts, identify the defective product, describe the damage suffered, quantify the claim (or reserve the right to quantify), and attach key documents. Set a reasonable deadline for response, typically 14 to 30 days.

Consider alternative dispute resolution (ADR) if the commercial relationship makes settlement viable. Mediation or negotiation can resolve claims faster and at lower cost, though it is not always appropriate, particularly where the manufacturer contests defectiveness or where the claim involves serious personal injury.

Tactical tip: All pre‑action correspondence should be routed through counsel. Limit statements that could be used as admissions. Preserve every email, letter, and record of telephone calls.

Step 4, Filing the claim in Swiss court

Who acts: Claimant’s counsel, court registry.

If pre‑action engagement does not resolve the dispute, file a civil claim with the competent cantonal court. Key considerations at this stage include:

• Court selection: Under Swiss civil procedure, the claim is generally filed at the domicile of the defendant or at the place where the damaging event occurred. If the defendant is domiciled abroad, Swiss courts may have jurisdiction under the Lugano Convention or the Swiss Private International Law Act (IPRG), depending on the circumstances.
• Statement of claim: Draft the statement of claim (Klageschrift) identifying the legal basis (PrHG and/or OR), the facts, the evidence, and the relief sought (compensation for personal injury, property damage, economic loss, and, where applicable, pain and suffering).
• Dual pleading: Where appropriate, plead both PrHG strict liability and OR tort liability in the alternative. This protects the claimant if one basis is rejected.
• Interim measures: Swiss civil procedure permits applications for provisional measures (vorsorgliche Massnahmen), including preservation of evidence. Broad Anglo‑American‑style discovery orders (such as Mareva injunctions or Anton Piller orders) do not exist in Swiss law, but targeted court orders to preserve specific items of evidence or to compel the production of defined documents are available.
• Annexes: Attach all documents from the checklist in the required documents section below.

Step 5, Evidence phase, expert reports and hearings

Who acts: Parties, court‑appointed and party experts, court.

Once the claim is filed, the court manages the exchange of written submissions (answer, reply, rejoinder) and may appoint a court expert (Gerichtsgutachter) to examine the product and report on defectiveness and causation. Party‑appointed experts may also submit reports. Swiss civil procedure does not provide for broad US‑style discovery or e‑discovery; document production is limited to specifically identified documents that the opposing party is obliged to produce.

Oral hearings follow the exchange of evidence. The court will hear witnesses, review expert testimony, and, in most cantons, attempt to facilitate settlement at a conciliation hearing. A judgment is rendered on the merits, with the losing party typically ordered to pay a contribution towards the prevailing party’s legal costs.

Required Documents and Information

Assembling a complete documentary record is essential before filing. The following table lists the documents needed for a product liability claim in Switzerland, with notes on who issues them and what format to collect.

Collect originals wherever possible and prepare certified copies for the court file. Organising these documents early accelerates the drafting of the statement of claim and reduces the risk of gaps in evidence that could undermine the case.

Timeline and Key Deadlines for a Product Liability Claim in Switzerland

Limitation periods, the legal deadlines by which a claim must be filed, are the most critical dates in any product liability procedure. Missing a limitation period extinguishes the right to claim, regardless of the strength of the underlying case.

Statutory limitation periods

Under the Swiss Code of Obligations (OR), the following limitation rules apply to product liability and related tort claims:

• Relative limitation period: 3 years from the date the claimant knew (or should have known) of the damage and the identity of the liable person (OR Art. 60 / Art. 128a).
• Absolute limitation period: 10 years from the date of the act or omission that caused the damage. For claims arising from death or bodily injury, the absolute limitation is 20 years under the relevant provisions of the revised OR.

Practical example: A consumer purchases a household appliance in 2020. A latent manufacturing defect causes a fire and personal injury in January 2025. The consumer learns of the defect and identifies the manufacturer in March 2025. The relative 3‑year period runs from March 2025 and expires in March 2028. The absolute 20‑year period (for bodily injury) runs from the date of the causative act (the date the defective product was manufactured or put into circulation). Filing well before expiry is critical, allow at least 2 to 3 months of lead time to prepare the claim.

Costs, Fees, and Tax Considerations

Understanding the cost of a product liability claim in Switzerland helps claimants plan their budget and assess the economic viability of litigation. The table below sets out the principal cost items. All figures are indicative ranges and should be verified against the fee schedules of the relevant canton and service providers.

Funding options

Several funding mechanisms may reduce the upfront financial burden:

• Insurer subrogation: If an insurer has paid indemnity for the damage, it may pursue the claim in its own right or support the insured claimant’s action.
• Commercial litigation funding: Third‑party litigation funding exists in Switzerland but the market remains limited compared to common‑law jurisdictions. Specialist funders assess claims on a case‑by‑case basis.
• Legal aid: Swiss cantonal courts grant legal aid (unentgeltliche Rechtspflege) to claimants who cannot afford proceedings, subject to a merits test and means assessment.

Tax treatment of damages

Damages awarded for personal injury (pain and suffering, medical costs) are generally not taxable as income in Switzerland. Compensation for property loss or economic damage may have different tax implications depending on the circumstances. Consult a tax adviser for case‑specific guidance.

What Changes in 2026: EU Product Liability Directive and Swiss Practical Effects

The EU Revised Product Liability Directive (Directive (EU) 2024/2853) applies to products placed on the market or put into service in the EU after 9 December 2026. Although Switzerland is not an EU member state, the directive has significant practical implications for the product liability procedure in Switzerland in 2026 and beyond.

Key features of the new EU PLD

• Software as a product: The directive explicitly treats standalone software, including AI systems, as a “product” subject to strict liability. This expands the category of claimable defects to include software bugs, algorithmic errors, and cybersecurity vulnerabilities.
• Duty to update: Manufacturers who provide or should provide software updates bear liability if a failure to update causes or contributes to a defect. Logs of updates, patches, and security fixes become critical evidence.
• Disclosure of evidence: The directive gives national courts the power to order defendants to disclose relevant evidence, easing the burden on claimants in complex technical cases.

Practical effects for Swiss claims

Swiss manufacturers exporting to the EU and Swiss importers of EU‑origin products will need to comply with the new directive’s standards from 9 December 2026 for products entering the EU market. Industry observers expect Swiss courts to reference EU defect and safety standards when assessing PrHG claims involving products also sold in the EU, particularly for software and connected devices. Claimants should preserve software update logs, firmware version histories, and manufacturer security‑testing records. Counsel should consider citing EU PLD arguments when suing a foreign or EU‑based manufacturer, even where the primary claim is brought under PrHG.

Common Pitfalls and How to Avoid Them

• Altering or discarding the product before expert inspection. Once the product has been repaired, returned, or thrown away, proving the defect becomes extremely difficult. Preserve the product in its post‑incident condition, photograph it thoroughly, and maintain a clear chain of custody.
• Missing the relative limitation period. The 3‑year clock starts when you know (or should know) of the damage and the liable party’s identity. If you discover a defect late, document the date of discovery carefully and file a protective claim or request tolling measures promptly.
• Making unguarded admissions to manufacturers or insurers. Statements made in correspondence, phone calls, or social media posts can be used against you. Route all substantive communications through your legal counsel and avoid speculating about the cause of the incident.
• Pursuing the wrong legal basis. Claiming under warranty law alone when a PrHG strict‑liability claim would be stronger, or vice versa, can limit recovery. Instruct counsel early to assess all available bases and plead in the alternative where appropriate.
• Underestimating cross‑border service and enforcement challenges. If the manufacturer is domiciled outside Switzerland, service of proceedings must comply with international conventions (e.g., Hague Service Convention, Lugano Convention). Enforcement of a Swiss judgment abroad requires separate proceedings. Engage local counsel in the defendant’s jurisdiction early to avoid costly delays.

Sources

1. EUR‑Lex, Directive (EU) 2024/2853 (Revised Product Liability Directive)
2. Fedlex, Swiss federal law publication platform
3. Swiss Federal Supreme Court, Decision 4A_538/2017
4. Odat, Swiss Product Safety Act (PrSG, SR 930.11)
5. WIPO Lex, Swiss Code of Obligations (OR)
6. Université de Genève, Academic overview of Swiss product liability