Local SEO services: ASA rules for ranking claims

What to take away

How the CAP Code applies to local SEO services advertising

The CAP Code is the rulebook the Advertising Standards Authority enforces for non-broadcast ads. That includes your agency homepage, service pages, Google Ads, LinkedIn posts and pitch decks sent to prospective clients.

The Code is not optional for small agencies. It applies to any advertiser whose marketing is aimed at UK consumers, and it applies whether or not the agency is a member of any trade body.

The Advertising codes - ASA | CAP set out the core duties: ads must be legal, decent, honest and truthful, and must not mislead by action, omission, ambiguity or exaggeration.

For an SEO agency, the practical effect is that a claim like "we get clients to page one of Google in 30 days" is an advertising claim. It needs evidence before it appears anywhere public.

What counts as an advertising claim

The CAP Code treats implied claims as seriously as explicit ones. A graph on your homepage showing rising traffic implies a typical result. A case study headed "our process" implies the process caused the outcome.

Ranking positions, traffic growth, lead volume, revenue return and timescales are all objective claims. Objective claims must be capable of substantiation, and the ASA will ask for the evidence behind them.

Subjective claims are treated differently. "We are the friendliest team in Leeds" is puffery and hard to disprove. "We are the highest ranked agency in Leeds" is a factual claim about rankings and needs proof.

Where the Code sits alongside other UK regulators

The ASA handles advertising content. The Competition and Markets Authority handles unfair commercial practices and has taken action on misleading online reviews and endorsement practices.

The Information Commissioner's Office covers personal data used in review collection, lead forms and CRM follow-up under UK GDPR and the Data Protection Act 2018. If your testimonials include named clients, data protection duties apply.

Companies House and HM Revenue & Customs matter for a different reason: the ASA may check whether the company behind an ad is properly registered, and unregistered trading is a separate problem.

Our guide to local SEO advertising rules explains why every published claim should carry a documented source.

How ASA guidance applies to ranking and results claims

ASA rulings are published case decisions. They are not legally binding in the way a court judgment is. For local SEO agencies, they can illustrate how the ASA applies the CAP Code, but each claim still needs evidence that supports its own wording.

The Rulings - ASA | CAP archive is searchable by sector and by claim type. Agencies can use it to understand how the regulator approaches advertising disputes, while checking that the evidence supports their own claims.

For a local SEO agency, the practical issue is whether its evidence supports the wording of each claim. Keep a clear document trail so the material behind a claim can be produced if the ASA asks.

Substantiating ranking and results claims

For a first-place ranking claim, keep records of the search term, location and date. A screenshot without that context may not substantiate the claim.

For a percentage uplift claim, keep the baseline, measurement method and sample size. Without those details, the figure is difficult to verify.

Why testimonials alone do not rescue a claim

A client quote saying "we went from invisible to page one" is a testimonial, not substantiation. It supports the client's experience, not a general promise that all clients achieve the same.

An absolute ranking claim and a testimonial that implies typical results raise distinct issues. The agency needs evidence for the ranking claim and must ensure the testimonial does not imply that one client's experience is typical.

Reviewing the ASA archive before publishing a headline claim is a practical compliance step. Agencies should also make sure their own evidence supports the exact claim they plan to use.

Worked example: a claim that would fail

Suppose an agency in Manchester runs a homepage banner reading "Number one rankings for every client, delivered in 90 days."

Three problems appear at once. "Every client" is an absolute claim. The 90-day deadline is a promise the agency cannot control, because Google sets rankings. And that deadline applies to every client, not one.

A compliant version would name the service, the location, the period and the measured outcome, and would hold the underlying data. Something like: "For our Manchester plumbing clients in 2025, 14 of 20 tracked keywords reached the top three within six months." That version is still a claim, but it is one the agency can support.

Substantiating results claims with evidence before you publish

The CAP Code requires that advertisers hold evidence before an ad appears. You do not need to publish the evidence, but you must be able to produce it if the ASA asks.

Evidence should be contemporaneous. Data reconstructed after a complaint carries less weight than a report generated at the time the result was measured.

Evidence should match the claim. If the claim is about local pack visibility in Bristol, a national organic traffic chart does not substantiate it.

Building a claims register

A claims register is a simple document listing every claim the agency publishes, where it appears and what supports it. It takes an afternoon to build and saves weeks of scrambling.

Each row should name the claim, the channel, the evidence file, the person responsible and the review date. When a claim changes, the register changes with it.

What good evidence looks like

Rank tracking exports should show the keyword, the location, the device and the date range. A single screenshot of a search result is weak evidence because it cannot show trend or context.

Traffic evidence should come from a source the client can verify, such as Google Analytics or Search Console, with the date range visible.

Revenue and lead claims need client-side confirmation. A CRM export or a signed client statement is stronger than an agency-produced summary.

If you work across England, Scotland, Wales and Northern Ireland, keep location evidence separate. A result in Greater London does not substantiate a claim about the North West England or West Midlands market.

Our article on local SEO service standards argues that every published rule should have a named source behind it.

Pitfalls that trip up agencies

A common mistake is using an average without saying what is being averaged. "Average 240% traffic growth" means little without the client count and the period.

Another is quoting a best-case client as if they were typical. The ASA looks at the overall impression, and one outlier presented as normal is misleading.

A third is stale evidence. A 2021 case study used in a 2026 pitch may still be accurate, but the agency should be able to explain why it remains representative.

Testimonials, endorsements and the ASA claims topic

Testimonials are persuasive and legitimate, provided they are genuine and not used to imply more than they prove.

The Claims, endorsements and testimonials - ASA | CAP guidance covers how the regulator treats quotes, reviews, awards and expert endorsements in advertising.

The core rule is that a testimonial must be genuine, and the advertiser must hold evidence that it is. Fabricated or incentivised reviews that are not disclosed breach the Code.

Rules for client quotes

A quote should be attributable to a real client who has agreed to its use. "A satisfied client" is weaker than a named business, and anonymous quotes invite scrutiny.

If a quote contains a results claim, the agency needs evidence for that claim too. The client's experience does not remove the substantiation duty from the advertiser.

Where a testimonial is used in a pitch document rather than on a public page, the CAP Code still applies if the document is marketing material. Pitch decks are advertising when they promote the agency's services.

Awards, badges and endorsements

Awards must be real, current and accurately described. "Award-winning" without naming the award, the year and the awarding body is a claim the ASA can challenge.

Badges from software platforms should reflect an actual accreditation held at the time of publication. A lapsed partnership badge is a misleading claim.

Endorsements from named experts or bodies need permission and must be relevant to the claim. A web design award does not endorse an SEO ranking promise.

Review platforms and UK data protection

Collecting reviews involves personal data. Under UK GDPR and the Data Protection Act 2018, the ICO expects a lawful basis, a clear privacy notice and a way for clients to withdraw consent.

Platforms such as Google Business Profile (UK) have their own review policies on top of the CAP Code. Removing negative reviews improperly can itself become a misleading practice.

Our piece on local SEO rules and ethics looks at why trust now decides which agencies win work.

Sanctions, Trading Standards referrals and non-compliant advertiser lists

The ASA has no power to fine. Its sanctions are reputational and practical, and they escalate when an advertiser does not comply.

The Sanctions - ASA | CAP page explains the regime, from asking for an ad to be amended or withdrawn to publishing the advertiser's name.

Most cases end at the first stage. The ASA contacts the advertiser, explains the problem and asks for a change. Compliance rates are high because the request is public and the fix is usually simple.

The escalation ladder

If an advertiser refuses to comply, the ASA can place an ad alert, which warns media owners and platforms not to run the ad.

It can also publish the advertiser on its non-compliant online advertisers list. That list names businesses that have not responded or have refused to amend, and it is public.

Paid search ads can be removed by the platforms involved once an ad alert is issued. For an agency selling visibility, being invisible in search is a serious commercial problem.

Trading Standards referrals

Persistent non-compliance can be referred to Trading Standards, which sits within local authority trading standards services across England, Scotland, Wales and Northern Ireland.

Trading Standards can investigate under consumer protection law, and the CMA can act on unfair commercial practices. A referral moves the matter from reputational risk into legal risk.

The ASA also shares information with other regulators where relevant, including the ICO on data matters and the FCA where financial promotions are involved.

What a ruling does to an agency's pipeline

A published ruling is indexed and searchable. Prospective clients researching an agency will find it, and competitors will cite it.

Referrals from accountants, web developers and business networks slow when a ruling is public. The commercial damage usually exceeds the cost of fixing the claim in the first place.

The practical response to a ruling is to comply quickly, correct the claim everywhere it appears, and document the change. Delay turns a small correction into a named listing.

Compliance steps for agency websites and pitch documents

Compliance is a process, not a one-off edit. The agencies that stay out of trouble treat claims as assets with owners and review dates.

Start with your homepage. It carries the highest-traffic claims and the ones most likely to be screenshotted by a complainant.

Website checklist

Pitch document rules

Pitch decks are advertising, so the same standards apply. A slide promising "top three rankings in 60 days" needs the same evidence as a homepage banner.

Keep a central evidence pack for pitches. It should hold rank tracking exports, analytics screenshots with visible date ranges, and client approvals for any named case study.

Avoid comparative claims about competitors unless you can prove them. "Better results than any agency in Birmingham" is a claim about the whole market and is very hard to substantiate.

If a prospect asks for a firm ranking promise, the honest answer is that rankings are influenced by factors outside any agency's control. Explaining that constraint is better than promising something you cannot deliver.

Our review of local SEO best providers sets out the checks buyers in England use before naming an agency.

Training and internal sign-off

Everyone who writes marketing copy needs to know the rules. A short internal briefing on the CAP Code prevents most problems before they reach publication.

Set a rule that no new claim goes live without a second pair of eyes. The reviewer checks the evidence file, not just the wording.

Keep a log of claims that were removed or rewritten. It shows a pattern of compliance and helps when onboarding new staff.

Using Copy Advice before publishing ranking claims

The ASA runs a free, confidential pre-publication service for advertisers. It is the cheapest way to test a claim before it goes live.

The Copy Advice - ASA | CAP service lets agencies submit draft copy and receive an opinion on whether it is likely to breach the Code.

Copy Advice is not a binding ruling and does not prevent a complaint from being upheld. It is an informed view, and it is useful evidence that the agency took compliance seriously.

How to use it well

Submit the specific claim, not the whole website. A question such as "is this ranking claim substantiated by this evidence?" gets a clearer answer than a general request for review.

Include the evidence you hold. Copy Advice can only assess substantiation if it can see what supports the claim.

Allow time for a response before your campaign launch. Building the check into your content calendar is easier than rushing a fix after publication.

When to use it

Use Copy Advice for any new headline claim, any comparative claim, and any claim that names a ranking position or a timescale.

Use it when you enter a new sector or region, because the evidence that supports a claim in one market may not support it in another.

Use it before a major pitch if the deck contains results claims. A written opinion in the file is a useful answer if a prospect challenges your numbers.

What Copy Advice will not do

It will not write your ads, and it will not approve a claim that has no evidence behind it. The duty to substantiate sits with the advertiser.

It will not cover data protection questions, which sit with the ICO, or competition law questions, which sit with the CMA.

Treat it as one control in a wider system that includes the claims register, internal sign-off and periodic review. No single check removes the need for the others.

Common questions