The encyclopedia · Advertising & PR · Marketing decision · 2026
Hydro Service ignored the ad watchdog's binding order — so it published their name
Its limescale and eco claims had to be proven or dropped. Hydro Service kept them, sent a study the SLK rejected — and was named publicly for defiance.
Hydro Service Schweiz · 2026-03-04
What happened
Hydro Service Schweiz AG of Wohlen sells water treatment systems, and its advertising made three kinds of claims: about the company's technology, about limescale protection (Kalkschutz), and about environmental benefits. A competitor complained, and the Swiss Fair Trading Commission's First Chamber ruled on 10 September 2025 with a binding recommendation: substantiate the claims or stop using them. The recommendation was served on 25 September 2025.
The company did neither. It continued to use all the contested advertising statements without modification. On 13 November 2025 it finally submitted a study meant to prove its systems work — but the commission found it insufficient to satisfy the binding recommendation, and noted that a statement of position in enforcement proceedings cannot replace an appeal the company had missed.
On 4 March 2026 the Third Chamber granted the enforcement measures, and the sanction was the publication itself: SLK decisions are normally anonymised, but this one was put on the commission's website with the company named in full — the stated consequence of ignoring a binding recommendation. Under the commission's rules the name will be anonymised again one year after publication.
Why it happened
- The burden of proof is the rule of the game: technology and eco claims that cannot be substantiated must be dropped on request, not kept while hunting for evidence later.
- Defiance escalated a routine case: the claims survived the recommendation unchanged, and the late study could not substitute for the appeal never filed.
- Naming was the message: the commission normally anonymises its decisions — publishing the company's name was itself the sanction.
The lesson
A binding recommendation is a deadline, not an opening: keep unproven claims after being told to drop them, and the self-regulator publishes your name as the sanction.
Aftermath
The enforcement decision of 4 March 2026 was published with Hydro Service's full name — anonymisation follows one year after publication under Article 19(2) of the SLK Rules of Procedure. The underlying binding recommendation dated from 10 September 2025; the company's November 2025 functionality study was deemed insufficient.
Sources
- Schweizerische Lauterkeitskommission: Massnahme — Hydro Service Schweiz AG, Wohlen AG (4 March 2026)
- Schweizerische Lauterkeitskommission: Dritte Kammer session listing case Nr. 153/25 (21 January 2026)
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