Green Claim Advertising: New Legal Risks in Sustainable, Natural and Environmentally Friendly Claims

Updated: 3 September 2026 · Category: Review and Reputation Compliance

Green Claim Advertising: New Legal Risks in Sustainable, Natural and Environmentally Friendly Claims

Environmental claims such as ‘sustainable’, ‘natural’ and ‘eco-friendly’ must have concrete, verifiable support that does not mislead consumers. Vague or overly broad green claims create advertising-law and reputational risks.

Contents

Short answer
Why does it matter?
What should companies do?
How to measure it?
Sources
Frequently asked questions

Short Answer

Why Does It Matter?

Terms such as “sustainable”, “eco-friendly”, “natural”, “green” and “carbon neutral” can convey a broad conclusion about a product’s environmental performance. The Ministry of Trade’s environmental claims guidelines stipulate that general terms should not be used without explanation or in a way that creates uncertainty for consumers.

The changes of 1 August 2026 further strengthened this area. Environmental claims must identify the relevant stage of the product lifecycle, and certificates/approvals used in advertising must be substantiated by documents from authorized or appropriate independent sources. Green claim review therefore concerns claim scope and evidence quality as well as the tone of marketing copy.

What Should Companies Do? Seven evidence questions for environmental claims

What exactly does the claim say, and how broadly might consumers interpret it?
Does the claim concern the whole product, packaging, production or logistics?
Which lifecycle stage is explicitly identified?
Which measurement or test method supports the claim?
Are the data current and relevant to the market where the claim is published?
Can the source of the certificate or approval be verified?
Does the creative suggest a broader environmental benefit than the evidence supports?

Proposed Measurement Model for B10

Environmental claim layer	KPI
Scope	Lifecycle-stage disclosure coverage
Evidence	Claim evidence completeness
Certification	Certificate verification rate
Currency	Evidence age / last verification
Creative	Claim-to-evidence consistency rate
Channel	Consistent claim usage across channels

For example, a certain proportion of recycled material in the packaging alone does not automatically establish that the entire product is “eco-friendly”. The dashboard must match the scope of the claim to that of the document.

Expert Assessment

The most common problem in green claim review is that the evidence is narrower than the advertising message, rather than entirely absent. A test may cover only a particular component or production stage while the creative suggests environmental superiority across the whole product.

Therefore, legal control should not study the word in the text, but the total environmental message that the consumer will extract from the advertisement.

How to build a claim inventory

Track each environmental statement in the inventory using its own claim ID. Keep the full claim text, the product it concerns, sales channel, lifecycle scope, supporting document, document date and responsible team in one record. This lets you compare the evidence supporting “eco-friendly” on the website with the version of the same expression on a marketplace.

This matters especially for large product portfolios. Changes to packaging, suppliers or production methods do not automatically leave a previously valid environmental claim valid. Track the last evidence verification date together with the product version.

Evidence and advertising message must match in scope

Having a document does not mean a claim can be used in any form. Recycled material in one packaging component may support a claim only about that component. If the creative extends this to the overall environmental performance of the product or company, the claim exceeds the scope of the evidence.

Channel Consistency Should Also Be Monitored

A brand may give detailed explanations on its website while a marketplace seller presents the same product using only a broader phrase such as “100% eco-friendly”. Monitoring can therefore extend from brand-managed advertising to authorized sellers and marketplace product content, detecting different environmental claims for the same SKU across channels early.

The model also lets the content team build a library of safe claims. Centrally defining approved wording, conditions of use, supporting documents and prohibited extensions avoids repeating the same legal analysis from scratch for every campaign.

How to manage the claim library

A green claim dictionary should contain more than permitted wording. Each expression needs its permitted products, supporting document, scope limit, mandatory explanation and last review date. This prevents the content team from extending a packaging claim to the whole product.

The same dictionary can also show prohibited or high-risk variants. Defining in advance when broad terms such as “natural”, “sustainable” and “eco-friendly” need additional explanation shortens campaign production and improves consistency of legal interpretation.

When documents are renewed or the supply chain changes, the claim library can automatically set a review date. This prevents a claim approved years earlier from remaining in advertising after its supporting evidence changes.

Digital Risk and Compliance Analysis

B10 can match environmental claims in website, marketplace and social media advertising to evidence files to monitor claim scope, document validity and consistency across channels.