Trust is not enough: German Supreme Court tightens liability for Google Ads

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Marcel Pemsel

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Apr 8, 2026, 1:36:01 AM (9 days ago) Apr 8
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Trust is not enough: German Supreme Court tightens liability for Google Ads

In a landmark ruling in Google-Ads (I ZR 28/25), the German Supreme Court dealt with the question whether a retailer is liable for unlawful advertisements placed by Google on third-party platforms.

Background

The claimant is a registered qualified trade association whose members include numerous retailers of household electrical appliances. The defendant is a retailer for such appliances.

In June 2023, two advertisements appeared on a third-party platform for a fridge-freezer combination and an undercounter dishwasher offered by the defendant. Each ad displayed a product image, the defendant's company name, a product description and a price. At the bottom, the ads showed the entry "Energie: D" [referring to energy efficiency class “D” under EU law] but without the graphic label required by legislation. Clicking on the ad led to the defendant’s website, where the full energy label could be accessed.

The claimant argued that the advertisements were unlawful because they failed to display the energy efficiency class in the graphical format required by EU law, specifically, an arrow showing the efficiency class on the available spectrum of efficiency classes.

The defendant countered that it had neither created nor commissioned the ads. Rather, under a cooperation agreement, the defendant continuously transmitted product information to Google Ireland Limited, which then designed and placed ads on its own platforms and those of Google's partner network at its sole discretion. The defendant paid Google a fee for each click on these ads.

Both the District Court of Coburg and the Higher Regional Court of Bamberg dismissed the claim, holding that the defendant was not liable for the ads.

The German Supreme Court's decision

The German Supreme Court lifted the lower court’s decision and remanded the case for further proceedings.

The central question was whether Google qualifies as an "agent" of the defendant within the meaning of Sec. 8(2) German Act against Unfair Competition (“UWG”). This provision attributes unfair competition violations committed by agents to the business owner, ensuring that a business cannot escape liability by outsourcing activities to third parties.

The judges recalled the established test: liability under Sec. 8(2) UWG requires (1) an extension of the business owner's operations that benefits the owner, and (2) a certain control by the business owner over the risk area, including a decisive and enforceable influence over the agent's relevant activities. Crucially, what matters is not what influence the business owner actually secured, but what influence it could and should have secured.

1. Extension of the business operation

The Court held that the defendant had extended its business operation by delegating, at least in part, the task of advertising its products to Google under the cooperation agreement. The decisive factor was that the agreement amounted to a paid commission of Google to advertise the defendant's products, with the defendant providing Google the necessary product information.

a. Distinguishing affiliates from advertising agents

The judges drew a distinction from their earlier Haftung für Affiliates decision (IPKat here). In that case, the affiliate created its own independent product - a website - and placed advertising links on it at its own discretion and in its own interest. There was no "commission" in the sense of outsourcing the business owner's own activities.

By contrast, Google in the present case acted like a classic advertising agency: it offers its own service but it creates and places advertisements for the defendant's products on the basis of information provided by the defendant. The fact that Google retains discretion over the content, timing and placement of the ads does not change this assessment – just as the discretion of a traditional advertising agency does not prevent it from being an "agent" under Sec. 8(2) UWG.

b. Google's discretion and competitor ads are irrelevant

The Court rejected two additional arguments raised by the defendant.

First, the fact that digital advertising on the internet affords Google greater discretion – for example, in placing ads – does not take the arrangement outside the scope of Sec. 8(2) UWG.

Second, the possibility that Google might place ads for competing products right next to the defendant's advertisements does not preclude liability either.

2. Control over the risk area

The Court found that the defendant had sufficient control over the relevant risk area. Google designed and placed the advertisements on the defendant's behalf and relied on the product information provided by the defendant. The defendant's argument that it had no influence over how Google handled energy efficiency information was dismissed. It is irrelevant what influence the defendant actually secured in the cooperation agreement. What matters is what influence it could and should have secured.

3. Remand on the merits

The Court could not decide the case on the merits because the lower court had not made sufficient findings on whether the ads actually constituted an unfair commercial practice.

However, the judges provided detailed guidance for the new decision, noting that the ads likely violated the energy labelling requirements under EU law. In particular, the mere display of "Energie: D" without an energy label arrow showing the full efficiency spectrum does not comply with the Delegated Regulations (EU) 2019/2016 (for refrigerators) and (EU) 2019/2017 (for dishwashers). 

Comment

1. Ronald Reagan’s “trust, but verify” appears to be the gist of the German Supreme Court’s decision. If a retailer outsources its advertising to a third party, be it an advertising agency, Google or a similar platform, it should review each advertisement before publication. Otherwise, it may be liable for infringement of unfair competition. There is no “I did not know and had no influence” defence. The retailer could have secured influence.

2. The Court provided a clear demarcation between affiliate marketing (no liability) and advertising cooperation agreements (liability). In the Haftung für Affiliates case, the affiliate created its own product and merely linked to the retailer's offerings. In the present case, the retailer actively feeds its product data to Google, which then creates advertisements for those products. This distinction makes sense: if you provide the raw material and commission the advertising, you cannot disclaim responsibility for how it turns out.

3. As noted in my earlier post on the Haftung für Affiliates decision, the liability provision of Sec. 8(2) UWG has near-identical counterparts in German trade mark law (Sec. 14(7) German Trade Mark Act), copyright law (Sec. 99 German Copyright Act) and design law (Sec. 44 German Design Act). While the Court’s reasoning is specifically tailored to the cooperation agreement at issue, the underlying principles also apply in cases involving other IP rights. If, because of a mistake of the advertising agency or Google, an ad shows the trade mark of a competitor in an infringing manner, the retailer will be liable for trade mark infringement even though it had no knowledge of the infringement. 

The picture is by Ebubekir and used under the licensing terms of pexels.com.


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