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EU Green Claims Directive: Substantiation

If you've ever described a product as "eco-friendly," "green," or "sustainable," you need to read this closely. The EU Green Claims Directive makes vague environmental claims illegal and requires every specific claim to be verified by an accredited third party before it can appear on a product, website, or advertisement.

The core principle is simple and brutal: any explicit environmental claim must be substantiated before publication, verified by a third party before marketing, and accessible to consumers at the point of sale. If you can't prove it, you can't say it.

Claim Types Covered

The directive breaks environmental claims into four categories. Explicit claims — "80% recycled plastic," "Carbon neutral certified" — need full substantiation plus ex-ante verification plus point-of-sale access to the evidence. Comparative claims — "30% less CO2 than our 2020 model" — need the same plus comparative data and methodological equivalence disclosure. Environmental labels (EU Ecolabel, Nordic Swan, self-declared logos) face governance requirements and periodic recertification.

And then there's the fourth category: generic claims. "Eco-friendly." "Green." "Good for the planet." "Sustainable." These are banned outright from 2026 unless accompanied by a specific, substantiated claim on the same medium. The ECGT Directive already bans them without substantiation; the Green Claims Directive closes the loophole.

Substantiation Requirements

Every explicit environmental claim must be substantiated using a recognised scientific methodology. The directive requires:

1. Lifecycle Perspective

Substantiation must cover the full lifecycle of the product or service — or at minimum, a clearly defined stage. A claim about recyclability must address the end-of-life stage. A carbon footprint claim must address manufacturing, use, and disposal unless explicitly scoped otherwise.

The methodology must be:

  • Recognised by the scientific community (ISO standards, PEFCRs, environmental footprint methods)
  • Specific to the product category (sector-specific rules where available)
  • Transparent and reproducible (the raw data and methodology must be available for verification)

2. Specificity

Claims must be specific to the product or service being marketed. A company-level sustainability achievement (e.g., "We offset our carbon emissions") cannot be applied to individual products unless the product directly contributes to the outcome.

3. No Offsetting as a Substitute

The directive imposes strict rules on carbon offset-related claims:

  • "Carbon neutral" claims based on offsetting must disclose the proportion achieved through emissions reductions vs. offset purchases
  • Offsets must meet additionality, permanence, and no-double-counting criteria
  • Claims based solely on offset purchases — without actual emissions reductions — are treated as misleading

4. Comparative Claims

Comparative claims must:

  • Use equivalent methodologies for both products being compared
  • Disclose the baseline year for temporal comparisons (e.g., "30% less than 2020")
  • Not claim superiority based on a single attribute when the product is worse on other environmental dimensions
  • Be updated at least every two years if the comparison remains in marketing materials

Ex-Ante Verification

This is the directive's most significant operational requirement. Before an explicit environmental claim appears on a product, website, or advertisement, it must be verified by an accredited third-party verifier.

Verification Process

The process has six steps. You prepare a substantiation dossier — methodology, data, calculations, supporting evidence. You appoint an accredited verifier who must be independent and conflict-free. The verifier assesses the dossier against the directive's requirements. If it passes, you get a certificate of conformity valid for up to two years. The claim can now be used in marketing, and the certificate number must be accessible to consumers. After two years — or earlier if the product changes — the whole thing restarts.

Transitional Arrangement

For the first 18 months after transposition, companies may self-declare conformity if the substantiation methodology is a publicly recognised international standard (ISO 14024 Type I ecolabel, EU Ecolabel, or similar). After the transitional period, third-party verification is mandatory for all claims.

Environmental Labelling Governance

If you operate or participate in an environmental labelling scheme, the directive imposes five governance requirements. Schemes must have transparent governance with stakeholder representation and independent oversight. Criteria must be reviewed and updated at least every five years. Verifiers issuing certifications must be accredited under Regulation 765/2008. A public register of certified products is mandatory. And certification fees and cost structures must be publicly disclosed.

Existing labels have a three-year transition period to align. If your self-declared "eco" logo doesn't meet these standards, it won't survive the transition.

Penalties

Publishing an unverified claim, making a false or misleading environmental claim, or failing to provide substantiation documentation on request each carries a fine of up to 4% of annual turnover. On top of that, member states can confiscate revenues from non-compliant products, exclude you from public procurement, and publish non-compliance notices. A non-compliant label or certification scheme can be suspended or withdrawn entirely.

Relationship with the ECGT Directive

You need to comply with both, and they serve different functions. The Empowering Consumers for the Green Transition Directive (2024/825) came first and bans generic claims and misleading environmental marketing — it's prohibition-based, with no verification requirement. The Green Claims Directive adds substantiation and third-party verification on top. The ECGT bans the easy shortcuts; the Green Claims Directive makes the remaining legitimate claims expensive to verify. Together, they create a regulatory sandwich that leaves no room for unsubstantiated environmental marketing.

Practical Preparation Steps

  • Audit all existing environmental claims — Every claim on your website, packaging, social media, retail listings, and advertising. Identify which claims are explicit, comparative, or generic.
  • Identify substantiation gaps — For each claim, determine whether the underlying data and methodology exist. Where gaps exist, either commission the substantiation or remove the claim.
  • Engage with accredited verifiers — Accreditation bodies are currently certifying verifiers. Early engagement secures access to capacity.
  • Update labelling schemes — If you operate or participate in an environmental labelling scheme, assess its governance against the directive's requirements.
  • Move from generic to specific — Replace vague claims ("eco-friendly") with specific, substantiated claims ("80% recycled content verified by [verifier]"). This is legally safer and more credible with consumers.
  • Establish a claim management process — Every new marketing claim should pass through a standardised substantiation and verification workflow before publication.

Frequently Asked Questions

Does the Green Claims Directive apply only to B2C marketing?

No. It applies to all explicit environmental claims made in commercial communications, including B2B marketing, trade shows, procurement documentation, and sustainability reports. The scope is broader than consumer-facing advertising.

Can I use environmental claims if I have not yet received verification?

Not after the directive applies. Claims may only be published after ex-ante verification is complete. Publishing an unverified claim — even if the substantiation data is sound — is a violation.

Does the directive apply to claims made on social media?

Yes. Any explicit environmental claim made in the context of commercial communication — including organic social media posts, influencer partnerships, and paid advertising — is subject to the same requirements.

How long does verification take?

Verification timelines depend on the complexity of the claim and the methodology. Simple claims (recycled content percentage with supplier certification) may take weeks. Complex lifecycle-based claims (carbon footprint with full LCA) can take months. Plan accordingly.