Europe Is Cracking Down on 'Green' Hotel Claims: What Changed on Sept. 27
Hotels have spent years using terms such as 'eco,' 'green' and 'sustainable' to stand out in a crowded travel market. Now European regulators are treating those words less as branding and more as claims that must be proved.
On Sept. 9, the U.K.'s Advertising Standards Authority published rulings against Thomas Cook, loveholidays and DialAFlight over travel ads that used phrases including 'eco resort,' 'eco hotel' and 'eco-conscious resort.' The decisions came less than three weeks before the European Union's stricter greenwashing rules took effect on Sept. 27, 2026.
The Thomas Cook case involved a paid Google ad promoting the 'Sandos Caracol Eco Resort.' Thomas Cook argued that Google advertising tools had generated the wording automatically and that 'eco' had previously formed part of the hotel's name. The ASA was not persuaded. It found that consumers were likely to read 'eco resort' as describing an environmental characteristic or benefit, while the ad failed to explain what that benefit was.
Similar rulings against loveholidays and DialAFlight focused on 'eco hotel,' 'eco resort' and 'eco-conscious resort.' In the loveholidays case, the company said it was simply reselling third-party hotels and using names supplied by accommodation providers. That defense did not prevent the ASA from finding the ad misleading.
The ASA said it identified all three ads through its AI-powered Active Ad Monitoring system, which proactively scans online advertising for potential breaches. The rulings did not impose fines. But the U.K.'s broader consumer-protection regime gives the Competition and Markets Authority and courts the power to impose penalties of up to 10% of global turnover for breaches of consumer law.
Across the EU, the pressure comes from Directive (EU) 2024/825, known as the Empowering Consumers for the Green Transition Directive. Adopted in 2024, it applies from Sept. 27, 2026. The rules add several practices to the EU's blocklist of commercial conduct considered unfair in all circumstances.
Under the directive, generic environmental claims such as 'environmentally friendly,' 'eco-friendly,' 'green,' 'climate friendly' and 'carbon friendly' can be prohibited unless a business can demonstrate recognized excellent environmental performance relevant to the claim. For hotels, that means saying a property is 'eco-friendly' is no longer enough. They must communicate a measurable environmental achievement that is accurate and substantiated.
The directive also requires any qualifications to be presented clearly and prominently, not buried in fine print or on a separate page. Hotels should also review their sustainability badges: private sustainability labels generally need to be based on qualifying certification schemes.
Climate claims face particular scrutiny. A statement that a hotel stay has a neutral, reduced or positive greenhouse-gas impact cannot be based simply on carbon offsetting. EU member states had until March 27, 2026, to transpose the directive. The European Commission has confirmed that it enters into application from Sept. 27.
From that date, businesses must ensure that consumer-facing environmental claims and sustainability labels comply with the new requirements. Penalties will be enforced at the national level. When imposing a fine, authorities will consider factors such as the seriousness and duration of the violation and whether the business took steps to correct it. For certain major cross-border infringements, EU consumer-protection rules allow maximum fines of at least 4% of annual turnover in the member states concerned.
The shift reflects a broader regulatory move away from voluntary sustainability marketing and toward enforceable consumer protection. For hotels, the business risk is not only financial. Vague claims can invite investigations, damaged trust and lost bookings if travelers conclude that a property overstated its environmental credentials.
In Europe, the word 'green' is rapidly becoming less of a marketing shortcut and more of a claim businesses must be prepared to prove. For hotel companies, the immediate task is clear: audit websites, booking engines, paid search campaigns, social media, OTA listings, sustainability pages, badges and future climate promises.
The lesson from the U.K. cases is that even a word embedded in a hotel name and automatically pulled into an advertisement can become an environmental claim in the eyes of regulators.