Short answer
An environmental claim is unlawful under the Unfair Commercial Practices Directive (UCPD) when it is false or, in its overall presentation, likely to deceive the average consumer about a material feature and cause a transactional decision the consumer otherwise would not take. Hiding limitations, lifecycle boundaries, methodology or other material information can also mislead. Traders should possess robust evidence before publication and keep wording no broader than that evidence.
Stricter express rules apply through Member State measures from 27 September 2026. They ban sustainability labels not based on an eligible certification scheme or established by public authorities; generic green claims without relevant recognised excellent performance; claims about an entire product or business based on one aspect; and offset-based claims that a product has neutral, reduced or positive greenhouse-gas impact. Until then, those practices remain assessable under the UCPD's existing general rules and national implementing law.
The campaign date therefore determines which general and bright-line rules apply.
The currently applicable test
Directive 2005/29/EC applies to business-to-consumer commercial practices before, during and after a transaction. Article 6 covers misleading actions. A claim is misleading if it contains false information or, even if factually correct, its overall presentation deceives or is likely to deceive the average consumer about matters such as a product's nature, composition, benefits, risks, test results or expected results, and causes or is likely to cause a different transactional decision.
Environmental characteristics fit that framework. “Made with recycled material” might be literally true of packaging but misleading if imagery and prominence imply the whole product is recycled. A technically accurate emissions reduction may mislead if it compares different boundaries or time periods without saying so.
Article 7 covers misleading omissions: material information cannot be hidden or supplied unclearly, ambiguously, unintelligibly or too late. Space limitations matter, but the trader must use available means to direct consumers to essential qualifications. A footnote cannot reliably cure a dominant absolute headline that creates the opposite impression.
Sector-specific rules can change the route
The UCPD is a general consumer-law safety net. Article 3(4) says that where it conflicts with EU rules governing a specific aspect of an unfair commercial practice, those specific rules prevail for that aspect. Environmental marketing may therefore also engage product-specific rules—for example, rules governing cosmetics, food information, energy labels or regulated financial products. The trader must identify the relevant sector regime before treating the UCPD as the only test.
In a pending cosmetics case, Case C-435/25, Advocate General Norkus considered how the UCPD interacts with the Cosmetics Regulation when a distributor repeats a manufacturer's efficacy claim. His Opinion of 9 July 2026 proposes a conflict-sensitive approach: the specific regulation would displace the UCPD where parallel application would neutralise the sector-specific allocation of responsibility, but both could apply where there is no conflict. The Opinion is non-binding, concerns cosmetic efficacy rather than an environmental claim, and had not been followed by a Court of Justice judgment by 31 July 2026. It is therefore an illustration of the legal route, not a green-claims holding.
Evidence must match the wording
Article 12 lets courts and administrative authorities require traders to produce evidence for factual claims and treat them as inaccurate where evidence is absent or insufficient:
Authorities may require the trader to “furnish evidence as to the accuracy of factual claims in relation to a commercial practice”. —
The evidence should be available before launch, current, relevant to the marketed product and market, and capable of supporting the claim's full breadth. A narrow factory-energy certificate does not prove lifecycle carbon neutrality. A supplier assertion may require verification. Method, system boundaries, baseline, allocation, assumptions, uncertainty and material exclusions should be recorded.
The legal question is the communication's likely consumer meaning, not merely whether a technical team can construct a true interpretation.
Generic terms and visual impressions
Words such as “green”, “eco-friendly”, “sustainable”, “climate friendly” or “responsible” can suggest broad excellent performance. Under current law, the regulator assesses the average consumer's likely understanding, qualifications and substantiation. Colours, leaves, globes, brand names and labels contribute to the overall impression even without an express sentence.
A specific claim—“the bottle contains 80% post-consumer recycled plastic by weight”—is easier to test and substantiate than “planet friendly”. Specificity does not guarantee legality: the figure, denominator and product coverage still must be accurate and material limitations visible.
Sustainability labels
At present, a private label may mislead if its owner, criteria, verification, scope or independence is presented inaccurately or omitted where material. Claiming official approval that does not exist is already prohibited.
From 27 September 2026, the amended Annex I creates a per se ban on displaying a sustainability label unless it is based on a qualifying certification scheme or established by public authorities. A qualifying scheme requires transparent access and requirements, expert/stakeholder development, non-compliance procedures and objective monitoring by a competent, independent third party. Mandatory labels are outside the new definition; public schemes such as the EU Ecolabel remain possible on their terms.
Carbon-neutrality and offsets
Current offset-based claims must pass the existing misleading-action and omission tests. The trader should distinguish actual value-chain reductions from purchased credits, explain material boundaries and avoid suggesting that buying or using the product causes no climate impact.
From 27 September 2026, the new Annex expressly prohibits:
“Claiming, based on the offsetting of greenhouse gas emissions, that a product has a neutral, reduced or positive impact on the environment in terms of greenhouse gas emissions.” —
Examples in the Directive include “climate neutral”, “CO2 neutral certified”, “carbon positive”, “climate net zero” and “climate compensated”. Businesses may still communicate investments in environmental projects if the communication is accurate and does not turn them into a prohibited product-impact claim. Claims based on the product's actual lifecycle impact remain subject to all other UCPD rules.
The September 2026 express prohibitions
Member States were required to adopt and publish their transposition measures by 27 March 2026 and must apply them from 27 September 2026. Besides labels and offset claims, those measures will prohibit in all circumstances:
- a generic environmental claim without demonstrated, relevant recognised excellent environmental performance;
- an environmental claim about an entire product or business when it concerns only one aspect or an unrepresentative activity; and
- certain durability and reparability practices added by the same Directive.
A generic claim can become specific where its qualification is clear and prominent on the same medium. Recognised excellent performance must be relevant to the claim, such as qualifying Ecolabel performance or top performance under applicable EU law. One excellent attribute cannot support an unlimited “sustainable” claim spanning environmental and social matters.
Future targets and transition plans
Claims such as “net zero by 2040” concern future environmental performance. Today they require accurate presentation, material disclosure and adequate evidence under general UCPD rules. From 27 September 2026, Article 6 expressly treats such a claim as misleading unless supported by clear, objective, publicly available and verifiable commitments in a detailed and realistic implementation plan. The plan needs measurable, time-bound targets, resources and regular verification by an independent expert whose findings are available to consumers.
Changing an ambition slide into a public promise therefore requires governance: ownership, budget, interim milestones, methodology, progress reporting and a process to correct advertising if assumptions fail.
A pre-publication checklist
- What would the average consumer understand from the words, imagery and label together?
- Does the evidence cover the whole product, lifecycle, geography and period implied?
- Are comparison baseline, denominator and methodology consistent and current?
- Are limitations prominent on the same medium rather than hidden after the headline?
- Is a label public or supported by an eligible independent certification scheme?
- Does a carbon claim separate actual lifecycle performance from offsets?
- Are future targets measurable, funded, time-bound and independently verified?
- Which rules apply on the campaign date, especially across 27 September 2026?
Conclusion
Environmental marketing is judged by the consumer-facing impression and its effect on purchasing decisions. Current UCPD rules already require truth, clarity, material disclosure and evidence proportionate to the claim. From 27 September 2026, the EU adds bright-line bans for unqualified labels, generic claims, overbroad whole-product claims and offset-based product neutrality claims, plus detailed conditions for future-performance promises. Narrow, specific language backed by product-relevant evidence is therefore safer than an ambitious slogan supported only by partial data.
Sources
This article provides general legal information, not advice for a specific matter. Laws, facts and procedural deadlines may change the result. Follow the linked primary sources and obtain local advice before acting.