Can You Use Client Logos on Your Website in the UK?

Client logos, testimonials and case studies can make a service business look credible very quickly. They can also create legal friction if you publish them without asking, overstate the relationship, reveal confidential work or imply that a client endorses your business more broadly than they actually do.

Common mistakes include lifting a logo from a client's website, relying on a friendly email as blanket permission, naming results from a confidential project, or leaving old logos online after the contract ends. These issues matter for agencies, consultants, SaaS providers, accountants, recruiters and other B2B service businesses that rely on trust.

A safer approach is to decide what you want to publish, get clear permission, keep the wording accurate and build marketing consent into your client terms from the start.

Permission Checklist Before Publishing a Client Logo

You should usually get express permission before using a client logo, testimonial or case study in your marketing. A logo is not just a nice design asset. It often functions as a trade mark and carries commercial meaning, so the client will usually want control over where and how it appears.

In practical terms, client logo permission in the UK should answer a simple question: would a reasonable person at the client organisation be comfortable with this exact use, in this exact context, for this exact period of time? If the answer is unclear, ask before publishing.

A sensible pre-publication checklist for a service business includes:

• What are you using? A logo, trading name, testimonial quote, screenshot, project image, performance data, employee name, employee photo or full case study.
• Where will it appear? Your website, proposal deck, pitch email, social media, paid ads, awards entry, investor deck, webinar, directory listing or printed brochure.
• What does it suggest? A past client relationship, an active client relationship, an endorsement, a brand partnership, certification, preferred supplier status or measurable results.
• Who gave approval? A founder, marketing manager, procurement lead, account contact or someone with authority to approve brand use.
• Are there limits? Approved logo file, brand guidelines, wording changes, territories, platforms, review rights, expiry date or withdrawal process.
• Does it reveal confidential information? Project scope, business strategy, pricing, revenue figures, customer data, technical details or internal problems solved.
• Does it include personal data? Names, job titles, headshots, direct quotes, video clips or information that identifies an individual.

For example, a software consultancy might have permission to say it completed an internal automation project for a retail brand. That does not automatically mean it can publish the retailer's logo on its homepage, quote the client's head of operations by name, and state that it saved the client six figures.

Think of permission as asset-specific and use-specific. A yes to one piece of marketing is not always a yes to every future campaign.

What Client Logo Permission Should Say

Good permission wording should say exactly what the client allows you to use, where you can use it and how either side can bring that permission to an end. Vague wording is the main reason logo and testimonial approvals become awkward later.

If you are asking after a project has finished, a short written approval can work. If you publish client work regularly, it is better to include a marketing consent in your client contract or service agreement, then confirm the details of each case study and marketing service agreement before it goes live.

A practical client logo permission clause might cover:

• Approved materials: The client's name, logo, trade marks, testimonial quote, project description and any approved images or screenshots.
• Approved channels: Your website, social media, pitch decks, email marketing, proposals, case studies, sales materials, direct marketing consent wording and award submissions.
• Purpose: Marketing your services, describing your experience and demonstrating past work.
• No false endorsement: A statement that use of the logo does not imply sponsorship, certification, partnership or ongoing endorsement unless expressly agreed.
• Approval process: Whether the client must approve each case study, quote or public statement before publication.
• Brand rules: A requirement to follow the client's brand guidelines or use only the logo files supplied by the client.
• Time period: Whether permission lasts for the contract term, for a set period after completion, or until withdrawn.
• Withdrawal: How the client can ask for removal and how quickly you will respond.

A case study consent clause can sit in your main client terms, statement of work or master services agreement. It should be easy to find. If marketing consent is buried in dense boilerplate, you may still face relationship issues even if the wording is technically broad.

Here is a plain English style of wording many businesses use as a starting point:

The client agrees that we may refer to the client as a customer and use the client's name and logo in our website, proposals and marketing materials for the purpose of describing our experience, provided that we do not disclose confidential information or imply endorsement beyond the fact of the client relationship. Any detailed case study, testimonial or results statement will require the client's prior written approval.

That wording separates basic logo use from more detailed public claims. It also makes clear that confidential information remains protected. For higher profile clients, regulated industries or enterprise customers, expect the client to negotiate tighter controls or remove the permission entirely.

If you already have a signed contract without marketing consent, do not assume silence means yes. Send a short approval request showing the exact logo placement, testimonial wording or case study draft. Ask for confirmation from a person who reasonably appears to have authority to approve marketing use.

Trade Marks, Copyright and Implied Endorsements

A client's logo is usually protected by trade mark law, copyright law or both, so using it without permission can create intellectual property and misleading marketing risks. Even where the legal risk is low, the commercial risk of annoying a client can be high.

Under the Trade Marks Act 1994, a registered trade mark gives its owner rights to control certain uses of that mark, particularly where use affects the trade mark's function as a badge of origin. A logo may also be protected by copyright as an artistic work under the Copyright, Designs and Patents Act 1988.

For a service business, the main problem is not usually that a homepage logo grid tricks people into thinking you own the client's mark. The more realistic risk is that your use implies a level of endorsement, association or approval that is not true.

For example:

• A design studio lists a household-name company under our partners when it only completed one small subcontracted project for a regional office.
• A SaaS provider places a bank's logo next to a statement saying trusted by leading financial institutions even though the licence was a short pilot that did not roll out.
• A consultant uses a client's logo in a paid ad that suggests the client recommends the consultant to others.
• An agency keeps a client's logo on its homepage years after the client left and the relationship ended badly.

Those scenarios are different from a modest and accurate selected clients section where each logo was approved. Context changes the meaning of the logo.

UK advertising rules also matter. The Advertising Standards Authority applies the CAP Code to many forms of marketing, including website and social media marketing. Claims should be truthful, capable of substantiation and not misleading. If a testimonial says your work increased leads by 300%, you need evidence and context. If a logo suggests a current relationship, that should be accurate.

For B2B marketing, the Business Protection from Misleading Marketing Regulations 2008 can also be relevant where advertising misleads traders. For consumer-facing businesses, Chapter 1 of Part 4 of the Digital Markets, Competition and Consumers Act 2024 may be relevant to misleading commercial practices. The previous Consumer Protection from Unfair Trading Regulations 2008 may still matter for conduct before 6 April 2025 under transitional rules. You do not need to become an advertising law expert, but your marketing team should treat client logos and testimonials as claims that need support.

The safest framing is factual and limited. Phrases such as worked with, past client or selected experience are usually clearer than official partner, endorsed by or approved supplier unless those statements are true and documented.

Trade mark issues can also arise when you alter a logo. Do not recolour, crop, animate or combine a client's logo with your own branding unless their brand guidelines allow it. Use the approved file, keep clear space around it and avoid placing it in a way that suggests co-branding.

Case Studies, Testimonials and Confidential Information

A case study should not disclose confidential information unless the client has approved the specific disclosure. Many disputes start because the service provider thinks the results are impressive, while the client sees them as commercially sensitive.

Your client agreement may already include confidentiality obligations. These often protect information that is not public, including business plans, financial data, technical information, customer lists, pricing, internal processes and project documents. A case study that reveals any of those details may breach the contract, even if the logo use itself was approved.

Common confidentiality traps include:

• Results without approval: Publishing revenue growth, cost savings, conversion rates, fundraising figures or user numbers.
• Operational details: Describing the client's internal systems, supply chain, hiring plans, vulnerabilities or strategic priorities.
• Before-and-after images: Showing dashboards, mockups, customer records, premises or unreleased products.
• Subcontracted work: Naming an end client when your actual contract was with an agency, reseller or prime contractor.
• Regulated clients: Referring to healthcare, financial services, education or government projects without checking additional approval requirements.

A practical approval process makes using customer testimonials legally much easier. Send the client a finished draft, not just a broad idea. Mark the items that need approval, such as logo use, quotes, metrics, screenshots and publication channels. Ask for written approval and keep the approval with the project file.

Testimonials need extra care where an individual is named. A quote from a client's employee may include personal data, such as their name, job title, image and voice. If you process that personal data for your marketing, UK GDPR and the Data Protection Act 2018 are likely to apply. You should identify an appropriate lawful basis, provide clear privacy information about how the testimonial will be used, explain how long it may remain online and keep a process for update or removal requests. In practice, it is also sensible to get clear written approval before publishing a named quote, headshot or video.

You should also avoid editing a testimonial in a way that changes its meaning. Tidying grammar is one thing. Turning a cautious comment into a glowing endorsement is another. If you shorten a quote, keep the substance honest.

For video testimonials, get more detailed written approval. Video usually carries more personal data and brand value than a short written quote. Confirm the filming location, participants, final edit approval, platforms, paid advertising use, subtitles, still images and whether clips can be reused in future campaigns.

If a client refuses to be named, you may still be able to publish an anonymised case study. For example, a UK-based logistics company with 200 staff may be safer than naming the company. However, anonymisation only works if the client cannot be identified from the description. In niche markets, a combination of industry, location, size and project details can still point to one business.

A useful internal rule is to classify each case study before drafting:

1. Public client, low sensitivity: Logo and short project description approved, no confidential data.
2. Named case study: Client name, quote and detailed project narrative approved in writing.
3. Anonymised case study: No logo, no identifying details, client confidentiality checked.
4. Do not publish: Confidential, sensitive, regulated or commercially risky work.

Building Marketing Consent Into Your Client Terms

The best time to agree marketing rights is before the project starts, when the client terms, proposal and statement of work are being signed. Waiting until after a successful project can still work, but it gives the client complete leverage and can slow down your marketing pipeline.

Marketing consent in a client contract should balance your need to show credible work with the client's need to control its brand and confidential information. A heavy-handed clause that lets you use anything for any purpose may make procurement teams push back. A narrow clause that requires approval for every minor mention may be too slow for ordinary sales activity.

Most service businesses benefit from a two-tier approach:

• Basic customer reference rights: Permission to name the client and display the approved logo in ordinary marketing materials, subject to brand guidelines and confidentiality.
• Enhanced case study rights: Separate written approval for detailed case studies, testimonials, performance metrics, screenshots, press releases, paid ads and video content.

This structure is especially useful for agencies, consultants and SaaS businesses. Your sales team can maintain a credible client list, while the client still controls anything more detailed or sensitive.

Your terms should also work with the rest of the contract. A marketing clause should not contradict your confidentiality clause, data protection obligations, intellectual property provisions or termination rights. If your confidentiality clause says you cannot disclose the existence of the client relationship, your logo permission clause needs to be carefully limited or removed.

Consider including operational details such as:

• Who can approve marketing materials for each side.
• How approvals can be given, such as email confirmation from an authorised contact.
• How long the client has to review a case study before publication, if any review period is agreed.
• What happens if the client changes its branding or asks you to update the logo.
• How quickly you will remove a logo after a reasonable withdrawal request.
• Whether you can keep using already printed materials until they run out.
• Whether permission survives termination of the services, and for how long.

For larger clients, expect brand approval policies. Some enterprise contracts prohibit any public reference without prior written consent from corporate communications. If you sign those terms, your standard marketing clause may not help. Make sure your team records any client-specific restrictions in a central place, rather than leaving them buried in a signed PDF.

There is also a practical Companies House point for UK companies: client names, trading names and group structures can be confusing. The legal entity you contract with may not be the public brand whose logo you want to use. If you contract with a subsidiary but want to use the parent company's logo, get approval for the actual brand asset you plan to display.

When your business uses subcontractors or white-label arrangements, be even more careful. If your agency client hired you to deliver work for its own customer, you may not have permission to name the end customer. Your contract should state whether portfolio use is allowed and, if so, whether the agency, end customer or both must approve it.

Finally, keep a simple approval register. Record the client, asset approved, wording approved, approval date, approver, channels and any expiry or withdrawal terms. This protects you when a team member updates the website, recycles an old proposal deck or launches a new ad campaign months later.

FAQs

Can I Use a Client's Logo on My Website If They Paid for My Services?

No, payment for your services does not automatically give you permission to use the client's logo. You should get express permission in the contract or by a separate written approval that covers the website use.

Is an Email Enough for Client Logo Permission in the UK?

An email can be enough if it clearly identifies the logo, wording, channels and any limits. For repeat use, a written clause in your client terms plus project-specific approvals is usually cleaner.

Can I Publish a Case Study Without Naming the Client?

Yes, if the case study is genuinely anonymised and does not reveal confidential information. In a small industry, details such as location, project size and timing can still identify the client, so anonymisation needs care.

Do Testimonials Need Consent Under UK GDPR?

If a testimonial identifies an individual through their name, role, image, voice or other details, UK GDPR is likely to apply. You should identify an appropriate lawful basis, explain how the testimonial will be used and keep a process for update or removal requests. In practice, it is also sensible to get clear written approval before publishing a named quote, headshot or video.

Can a Client Make Me Remove Their Logo Later?

Yes, especially if your permission was informal, limited or withdrawable. Your contract should set out whether permission can be withdrawn and how quickly you will remove or update marketing materials.

Key Takeaways

• Client logos are usually protected brand assets, so get clear permission before using them on your website, pitch decks, social media or ads.
• A strong permission clause should cover approved materials, channels, purpose, brand rules, approval rights, time limits and withdrawal.
• Case studies and testimonials can create confidentiality, UK GDPR and misleading marketing issues if they reveal sensitive details or overstate results.
• Use careful wording such as past client or worked with, and avoid implying endorsement, partnership or preferred supplier status unless that is true.
• Build marketing consent into your client terms, then get separate approval for detailed case studies, metrics, screenshots and video testimonials.
• Keep an approval register so your team knows which logos, quotes and case studies can be used and when they need to be removed.

If you need help setting up client logo permissions, a case study consent clause, confidentiality wording or marketing consent in your client contracts, Sprintlaw UK's legal team can help. Contact us on 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.