When Marketing Claims Go Too Far: Why Brands Need Evidence Before They Sell

Brands face tighter pressure over the claims they make in ads, websites and product pages as UK regulators increase scrutiny of misleading marketing.

The issue is not limited to large companies. Small businesses can also run into trouble if they make claims they cannot back up, whether that claim is about price, quality, stock, delivery, reviews, environmental impact, health benefits or where a product is made.

The Advertising Standards Authority says marketers must hold evidence before publishing claims that consumers are likely to see as objective and capable of being proved. If they do not, the ASA may treat the claim as misleading.

A Strong Claim Still Needs Proof

Marketing often starts with a phrase that sounds harmless.

Best in class. Made to last. Eco-friendly. Clinically proven. Limited stock. UK’s favourite. Sustainable. Results guaranteed. Trusted by thousands.

Some of these phrases may be fine if the brand can support them. The problem starts when the wording moves from opinion into fact.

The ASA says subjective claims must not mislead consumers by presenting opinion as an objective claim. It also says marketers must hold documentary evidence before distributing marketing communications that include objective claims.

That line is important. A brand saying it loves making high-quality products is different from saying it makes “the UK’s highest-quality product” without evidence.

One sounds like brand language. The other sounds like a claim that can be tested.

Misleading Ads Are a Regular Complaint

Misleading advertising remains one of the main issues handled by the ASA.

The regulator says around 70% of complaints it receives each year are considered under rules about misleading advertising. Its guidance says those rules cover missing information, objective claims, pricing claims and comparisons with competitors.

That should make brands cautious about the words they choose.

A misleading claim does not always come from bad intent. It can come from loose wording, a rushed campaign, weak product copy or a line that sounds good in a meeting but cannot be proved.

For small brands, the safest approach is usually the strongest one: say exactly what can be supported.

If a product uses recycled packaging, say that. If an item is made in Britain, say where and how. If a discount is time-limited, make sure the timing is true. If a product has won an award, name the award. If reviews are used, make sure they are genuine and shown fairly.

Online Marketing Is Under More Pressure

Digital marketing has made claims easier to publish and easier to challenge.

A website can be updated quickly. Social posts can be shared in seconds. Paid ads can reach thousands of people in a day. That speed is useful, but it also means weak claims can travel fast.

The ASA describes itself as the UK’s independent regulator of advertising across all media, including online and social media. Its rules are not only for television, print or national campaigns. They also apply to digital ads, website claims and social media marketing.

For ecommerce brands, that means product pages, offer banners, paid ads and influencer content all need care.

If a customer is likely to understand a statement as factual, the brand needs to be ready to show why it is true.

Price Claims Need Care

Price claims can be risky because customers often make quick decisions based on cost.

That includes “was” prices, sale prices, countdown timers, limited-time offers, free delivery claims and hidden fees. If the customer sees a lower price at the start but has to pay extra mandatory fees later, the brand may face questions.

The Competition and Markets Authority says businesses that do not comply with consumer law can face action from enforcement authorities. It also says the CMA and the courts can now fine traders up to 10% of worldwide turnover.

Reuters reported in November 2025 that the CMA had launched investigations into eight companies over online pricing practices, including potential concerns around drip pricing and countdown timers. The report said the CMA had reviewed more than 400 businesses across 19 sectors since April 2025.

The message for brands is simple. Do not make customers work to find the full price. Do not use urgency unless the offer is genuinely time-limited. Do not suggest a saving unless the comparison is fair.

Reviews Are Also Under Scrutiny

Reviews can influence buying decisions, but they can also create risk if they are fake, filtered or presented unfairly.

The Guardian reported in March 2026 that the CMA had launched investigations into five companies over possible failings linked to fake and misleading online reviews. The concerns included fake positive reviews, suppression of negative reviews and manipulated star ratings.

For small brands, reviews are valuable because they help customers judge a product before buying. But they need to be used carefully.

Do not write reviews for yourself. Do not hide negative reviews in a way that gives customers a false impression. Do not offer rewards for positive reviews without making that clear. Do not imply all customers get the same result if they do not.

A good review strategy is not about making every comment look perfect. It is about giving customers a fair view of the product and service.

Green Claims Need Detail

Environmental claims are one of the most sensitive areas of marketing.

The CMA’s Green Claims Code says environmental claims should be truthful, accurate and supported by evidence. The ASA also says marketers should base environmental claims on the full life cycle of a product unless the ad says otherwise.

Broad claims can be risky. A product is not automatically “sustainable” because one part of the packaging has changed. A brand is not automatically “green” because it uses one lower-impact material. A business should not imply a whole range has a lower environmental impact if only one product has changed.

More specific claims are stronger.

Say what changed. Say which product it applies to. Say what evidence supports it. Say what the customer can check.

The Best Claims Are Specific

Good marketing does not need to make the biggest claim. It needs to make the most useful one.

A small brand might be tempted to say a product is “premium”, “ethical”, “sustainable”, “the best” or “made for everyone”. Some of those words may be too broad to mean much.

Specific claims work harder.

A coat is made from British wool. A coffee is roasted in small batches in Lancashire. A skincare product is fragrance-free. A bag is made from recycled polyester. A brand offers a 30-day returns policy. A product has 500 verified customer reviews. A jacket can be repaired.

Those statements give customers something to understand.

They also give the brand a safer foundation because the claim can be checked.

Small Brands Are Not Exempt

Some small businesses assume advertising rules are mainly aimed at big brands. That is not the case.

If a small business advertises to UK consumers, it still needs to follow the rules. That includes claims made on its website, in paid ads, on social media, in email marketing and through influencer partnerships.

The risk is not only regulatory. A weak claim can also damage customer confidence.

If a customer feels misled, they may not complain to the ASA or the CMA. They may simply leave the website, ask for a refund, post a poor review or choose another brand.

For small businesses, that loss can be costly.

Evidence Should Come Before the Campaign

Marketing teams should check claims before they go live, not after a complaint arrives.

That means asking simple questions during planning. Can we prove this? Would a customer read this as fact? Does the claim apply to one product or the whole range? Are there conditions we need to mention? Is the price shown in full? Are reviews being used fairly? Is the environmental claim too broad?

If the answer is uncertain, the wording needs work.

The best version is often more precise, not more dramatic.

Instead of “eco-friendly packaging”, say what the packaging is made from and whether it can be recycled. Instead of “limited stock”, say if there are fewer than 20 units left. Instead of “trusted by thousands”, say how many verified customers have bought or reviewed the product, if that figure can be checked.

Better Claims Build Better Marketing

Claims sit at the centre of marketing.

They shape ads, websites, product pages, captions, emails and sales messages. If those claims are vague or unsupported, the whole customer journey becomes weaker.

At Fortyand Co, we help small brands say what they mean in a way customers can understand. That means stronger product pages, safer paid ads, better customer journeys and marketing that does not rely on claims the business cannot prove.

Regulators are paying attention. Customers are paying attention too.

The brands that do this well will not be the ones making the biggest promises.

They will be the ones that can show why their words deserve trust.