Greenwashing is rarely a single dramatic lie. It is usually a thousand small calibrations — a colour palette, a hero photograph, a carefully ambiguous verb, an annual report that quietly removes the previous year's target. The diagnostic question is not whether the claim is false. It is whether the brand expression, taken as a whole, is doing strategic work that the underlying operation is not yet doing. There are tells. They are visible once you know where to look.

Two definitions of greenwashing

Most regulatory definitions of greenwashing, including the UK Competition & Markets Authority's Green Claims Code, focus on demonstrable falsity — a claim that can be proved untrue, an environmental benefit that is materially overstated, a label that does not match the underlying certification. These definitions are useful for enforcement and unhelpful for diagnosis. The interesting cases sit upstream: brand expression that is technically defensible and operationally misleading, claims that survive a regulator but not a reader. A more honest working definition: greenwashing is the gap between the position a brand is occupying in the audience's mind and the operational reality the underlying business can defend. The wider that gap, the more brittle the positioning. The brand work is doing work the operation has not yet earned. The tells are the small calibrations that hold the gap open.

Tell one: the action verb has gone missing

Genuine sustainability claims tend to use verbs the company has done — "reduced", "cut", "eliminated", "replaced". Greenwashed claims tend to use verbs the company is doing or aspires to do — "committed to", "working towards", "on a journey to", "exploring how to", "championing". The verb form is the first diagnostic. A page full of "committed to" and "working towards" with no completed past-tense actions is making a brand claim, not an operational claim. This is a useful test because it does not require sustainability expertise. A reader can scan a page in thirty seconds, count the action verbs, and ask: what is the company actually claiming to have done? If the answer is mostly "intentions" rather than "actions", the position the brand is occupying is rented from a future state of operations that may or may not arrive.

Tell two: the imagery is doing the work

The second tell is photographic. A page about sustainability that leans heavily on aspirational imagery — pristine forests, hands cradling soil, abstract green geometry, sweeping aerial shots of wind farms unrelated to the company's actual operations — is usually doing brand work the operation has not earned. The imagery imports an emotional register the page's text could not legitimately claim. The diagnostic question is: would this image still be on the page if the body copy were stripped out? If the image carries the entire emotional load and the copy is hedged and abstract, the brand expression is leaning on the image to do persuasion the words cannot defend. Conversely, claims supported by photographs of the company's actual operations — the actual factory, the actual fleet, the actual product — tend to be the claims the company is willing to be specific about.

Tell three: the time horizon is suspiciously generous

"Net zero by 2050" is a different kind of claim from "we have reduced emissions by 18% since 2022". The first sits beyond the tenure of any current executive; the second is a measurable commitment within the working life of the people making it. Long-horizon claims are not inherently dishonest, but a brand expression that lives almost entirely in the long horizon, with little operational accountability in the next two or three years, is using the time horizon to defer scrutiny. The test is to ask what the company is committing to do by the end of the current financial year, and the year after that. If the answer is granular and measurable, the brand has near-term operational backing. If the answer retreats immediately to 2040 or 2050, the brand work is running ahead of the operation by decades.

Tell four: the comparator is missing

"More sustainable", "lower impact", "less waste" — these are comparative claims with the comparator left unstated. More sustainable than what? Lower impact than which previous version? Less waste than which baseline? The unstated comparator is a structural greenwashing technique because it lets the reader supply the baseline in their head, which they almost always do generously. Honest sustainability copy names the comparator explicitly — "47% less plastic than the 2023 packaging" or "lower carbon footprint than the average industry equivalent based on the X methodology". A page full of comparatives with no comparators is a page that has chosen to be hard to fact-check.

Tell five: the certifications are doing rhetorical work they cannot bear

Certifications and labels are useful as shorthand. They become problematic when the brand expression treats them as more than they are. A small badge for a single product line, displayed at brand level across the website, suggests the certification covers more than it does. A membership in an industry sustainability working group, presented as if it were a verified standard, suggests an audit has happened that has not. Real certifications have specific scopes — a specific product, a specific factory, a specific year. Greenwashing tends to detach the badge from its scope. The diagnostic is to look at what the label actually certifies, and compare that scope to the way the brand is using it. If the label covers 12% of the company's output and the brand expression implies it covers all of it, the gap is the tell.

Tell six: the previous year's target has quietly disappeared

The most diagnostic single check on a sustainability claim is to read the previous year's report. Companies that are operationally serious about sustainability publish the previous year's targets next to their performance against them, even when the performance is unflattering. Companies that are doing brand work tend to refresh their targets each year without explicit reference to the previous year's commitments. The numbers get rebased; the previous baseline becomes hard to find; the year-on-year comparison is left to the reader to attempt. A serious company says "we missed our 2024 emissions target and here is why". An exposed greenwashing operation publishes a new and different set of targets each year and does not connect them to the old ones.

The structural shape of honest positioning

If those six tells diagnose the brittle versions, what does honest sustainability positioning look like? A few structural features recur:

• Specificity over expansiveness. Specific products, specific factories, specific years, specific methodologies. The honest version is narrower than the brittle version, and it is narrower on purpose.
• Past tense alongside future tense. Completed actions reported with their specific results, alongside future commitments with named owners and dates.
• Named methodology. The standard being measured against — Science Based Targets, Greenhouse Gas Protocol, ISO 14064, whichever applies — disclosed in plain English, not buried in a footnote.
• Visible scope. What is in and out of the claim, stated clearly. Scope 1 and 2 reported separately from Scope 3. Owned operations distinguished from supply chain. The reader is not asked to assume.
• Public acknowledgement of misses. The targets the company did not hit, reported with their reasons. This is the single strongest signal of operational sincerity.

The strategic argument for honesty

The argument for honest positioning is not only an ethical one. It is an operational one. Greenwashed brand expression is increasingly expensive because the regulatory environment has tightened, journalists and analysts have become more sophisticated, employees notice and leave, and customers — particularly in B2B — have begun building anti-greenwashing scrutiny into their procurement processes. The brand work that occupies a position the operation has not earned is generating commercial exposure on a timescale that gets shorter every year. The companies investing in honest positioning are not doing it because honesty is a competitive virtue. They are doing it because the gap between brand and operation is now financially material. The brand position they claim is the position they can defend three years from now under cross-examination from a regulator, an analyst, or a serious customer. That defensibility is increasingly a strategic asset, not a constraint.

What This Looks Like in Practice

In a recent engagement, a mid-market consumer brand asked us to help articulate a sustainability narrative. The initial brief was for a brand expression that "felt more progressive". The work we did instead was a positioning audit against the six tells above — and the operational gap was wide enough that a more progressive brand expression would have been brittle within eighteen months. The actual deliverable became two artefacts: a tighter, narrower positioning that the company could defend with its current operations, and a costed roadmap for the operational investments that would let the company expand the claim in twenty-four months. The brand work was honest; the operational work was real; the gap stayed small. Eighteen months later both have moved forward and the brand can claim more, with the same level of evidence behind each claim.

Closing

The tells of greenwashing are visible without specialised training. Missing action verbs, aspirational imagery, deferred time horizons, absent comparators, mis-scoped certifications, vanished previous targets. The honest alternative is specific, scoped, measured, methodology-disclosed, and publicly accountable for misses. The argument for honesty is increasingly that it is the cheaper position to defend. If you are not sure whether your current sustainability positioning is operationally defensible, we are happy to walk through what an honest audit would look like.