Using Client Logos on a UK Website: Do You Need Permission?

Displaying a recognisable client logo can make an agency, consultant or studio look instantly more credible. It can also create tension if the client never approved it, the project was confidential, the logo is a registered trade mark, or the case study reveals results the client considers commercially sensitive.

Common mistakes include assuming payment gives you portfolio rights, relying on a vague verbal yes, publishing a full case study when only a logo was approved, or using a client name in paid ads without checking trade mark permission. The safer position is to treat logos, testimonials and case studies as separate permissions that should be recorded in your service agreement, terms of trade or a later written approval.

With the right client logo permission clause, approval process and confidentiality checks, you can promote your work without surprising the people who trusted you with their brand.

When You Need Permission to Use Client Logos

You should usually get express permission before using a client logo on your website, pitch deck, social media, proposal, directory listing or award entry.

A client logo isn't just a decorative image. It's often a trade mark, a copyright-protected artwork and a commercial signal that suggests a relationship with the client. In the UK, registered trade marks are protected through the UK Intellectual Property Office system, while unregistered brand rights may also be protected through passing off if use misleads people or damages goodwill.

For agencies and consultants, the practical question isn't only whether the client could bring a legal claim. It's whether your use will annoy a client, breach your contract or make future approval harder. A client may not object to a private sales pitch saying you worked together, but may strongly object to a public webpage implying an endorsement.

Permission is particularly important where:

• the client is a well-known brand, regulated business, listed company, public body or charity;
• your project involved sensitive commercial information, unreleased products or internal systems;
• the client contract includes confidentiality, publicity or non-disclosure wording;
• you want to use the logo in paid advertising, landing pages or search ads;
• you plan to publish performance results, screenshots, before-and-after comparisons or testimonials;
• you're naming a client in a sector where supplier relationships are commercially sensitive; or
• your work involved a third party, such as a platform, franchise network, investor or end customer.

A simple client name in a list of past clients may still require consent if the contract restricts publicity. A full case study almost always needs clearer approval because it usually combines several legal and commercial issues: use of the logo, use of the client name, discussion of the project, data about outcomes, quotes from individuals and sometimes screenshots or images.

Don't assume that the client having paid your invoice gives you marketing rights. Payment usually covers the services and deliverables set out in the contract. Unless the contract says you can use the client name or logo for portfolio purposes, you may have no automatic right to do so.

Trade mark use permission is also about context. A logo on a portfolio page titled Our Clients is different from a headline that says Trusted by [Client] to transform its national strategy. The second version may imply endorsement, approval or a wider relationship than actually exists. The risk increases if the client is in a regulated sector such as financial services, healthcare, education or professional services.

If you want to use client logos on a UK website, your best evidence is written approval in the client agreement or a later written sign-off. Website terms can help clarify that logos and case studies don't imply endorsement, but they don't replace client permission. The strongest position is to include portfolio rights in the service agreement and then obtain project-specific sign-off before publication.

What a Client Logo Permission Clause Should Say

A good client logo permission clause should clearly say what you can use, where you can use it, for what purpose, and whether the client has approval or withdrawal rights.

Many disputes start because the contract only says the supplier may use the client as a reference. That wording is often too broad for the agency and too vague for the client. Does it allow the logo? A case study? Social posts? Award submissions? Paid ads? A webinar slide? A newsletter to prospective clients? If the contract doesn't answer those questions, both sides may later remember the deal differently.

For a startup agency, a practical portfolio rights contract clause should deal with these points:

• Materials: whether you may use the client name, logo, trade marks, testimonials, screenshots, project images and a description of the services.
• Channels: whether use is allowed on your website, proposals, credentials decks, social media, award entries, PR materials, email marketing and paid ads.
• Purpose: whether the use is only to promote your own services and show your experience, not to suggest sponsorship or partnership.
• Approval: whether the client must approve each use before publication, and how approval will be requested.
• Brand guidelines: whether you must follow the client brand rules, including colours, clear space, placement and wording.
• Confidentiality carve-out: whether any use is still subject to the confidentiality obligations in the agreement.
• Duration: whether the permission is ongoing, time-limited or ends when the client relationship ends.
• Withdrawal: whether the client can ask you to remove the logo, and how quickly you must do so.

A balanced clause might give the agency a general right to identify the client as a client for portfolio purposes, but require written approval for full case studies, testimonials, statistics, screenshots, paid ads and media announcements. This gives you a usable marketing right without making the client feel they have lost control of their brand.

Client-friendly businesses often prefer an approval process. That doesn't have to be slow. Your agreement can say that you'll send proposed wording and visuals to a named contact, and the client will respond within a reasonable period. If you want deemed approval after a certain period, make that explicit, but be aware that larger organisations may resist it.

Be precise about logos. Ask whether you may use the current logo only, an approved media kit version, or any logo supplied during the project. If the client later rebrands, your old case study may look outdated or create brand control issues. A sensible clause can require you to use the latest approved logo once the client provides it.

Paid advertising deserves separate treatment. Using a client logo in an organic portfolio page or marketing service agreement is one thing. Using it in ads to sell your services can feel much closer to endorsement. If you want that right, ask for it clearly. Many clients will say no, or will require pre-approval for every campaign.

Founders often ask whether an email saying happy for you to mention us is enough. It can be useful, but it may not cover the logo, the platform, the exact wording or future updates. If the relationship matters, send a short confirmation that records the specific permission. For example, say that the client approves use of its name and logo on your website portfolio page, alongside a short description of the project, subject to removal on written request.

Case Studies, Confidentiality and Approval Rights

A case study needs more than logo permission because it can disclose confidential information, personal data, performance claims, evidence of use and client opinions.

Case studies are powerful because they're specific. They usually describe a client problem, your method and the outcome. Those same details can make them risky. A revenue uplift, operational saving, conversion rate, product roadmap, internal problem or procurement story may be confidential even if it feels like a marketing success.

Start with the contract. Most service agreements include confidentiality obligations that prevent either party from disclosing non-public information learned during the engagement. Some clauses are broad enough to cover the existence of the relationship itself. If your non-disclosure wording says you must not disclose the client relationship without consent, a logo wall could breach it.

A case study consent UK process should be built around actual sign-off, not assumptions. Before publishing, send the client the finished version or a near-final draft. Ask them to approve:

• the use of their legal or trading name;
• the use of their logo and any brand assets;
• the description of the challenge, services and deliverables;
• any figures, metrics or commercial claims;
• quotes from employees, founders or customers;
• screenshots, product images, office photos or user interface images; and
• the publication channels and any planned promotion.

Approval rights should match the sensitivity of the content. A basic logo wall might only need a short written consent. A long case study about a strategic project should have formal approval, especially if you name individuals or share measurable outcomes.

UK GDPR and the Data Protection Act 2018 can also be relevant. A company logo isn't personal data, but a case study may include the name, job title, photograph, quote or contact details of an individual. If you feature a named marketing director, founder or employee, you need a lawful basis for using their personal data and you need to be transparent about what you'll publish. In practice, written approval from the client and the individual is often sensible for named quotes or images.

Testimonials need care too. A quote from a client contact may be copyright-protected if it has enough originality, and it may be personal data if the person is identified. Don't edit a quote in a way that changes its meaning. Keep evidence of the approved wording and the date it was approved.

Performance claims should be accurate and capable of being substantiated. UK advertising rules, including the CAP Code for non-broadcast advertising, can apply to marketing claims you make online. If your case study says you increased revenue by 300 percent, reduced costs by half or delivered guaranteed results, keep evidence and avoid implying that every future client will achieve the same outcome.

Approval rights aren't just legal protection. They preserve the client relationship. A client who spots an unapproved case study may worry that you're loose with confidential information, even if the content is positive. For agencies that rely on referrals, that reputational cost can be greater than the legal risk.

A workable internal process is simple. At the end of each project, ask the account lead to identify whether the work is suitable for a logo mention, anonymised case study or named case study. Then check the contract, prepare the content, send it to the client for approval, store the approval and diarise any review date or withdrawal right.

Where the client says no, consider alternatives. You may be able to publish an anonymised case study that says a UK fintech startup, a regional hospitality group or a B2B SaaS company instead of naming the client. Even then, avoid details that make the client obvious if confidentiality applies.

Copyright, Moral Rights and Portfolio Ownership

Your right to show work in a portfolio depends on who owns the relevant copyright, what the service agreement says, and whether creators have moral rights that need to be respected or waived.

Agencies often create materials that sit behind a client logo: designs, photographs, copy, software, campaign concepts, brand assets, videos, reports and website pages. In the UK, copyright can protect original literary, artistic, musical, dramatic and certain other works, including software code and graphic designs. Copyright arises automatically, but ownership depends on the circumstances.

If your employee creates work in the course of employment, the employer will usually own the copyright. If a freelancer, contractor, photographer, illustrator, developer or copywriter creates the work, they may own copyright unless there's a written assignment or outsourcing agreement with your business. This matters because you can't confidently license or display work you don't control.

Your client agreement may transfer intellectual property in the deliverables to the client. If it does, you may still want a retained right to display the work in your portfolio. Without that carve-out, the client could argue that you assigned the relevant rights and kept no right to reproduce the work publicly.

A portfolio clause should sit alongside the IP ownership clause, not contradict it. For example, the agreement can say that the client owns the final deliverables once paid for, but the agency may use approved extracts, images and project descriptions for portfolio and credentials purposes, subject to confidentiality and brand approval. That approach gives the client ownership of what they bought while preserving your ability to show your experience.

Moral rights also deserve attention, especially in creative work. Under UK copyright law, authors and certain creators can have moral rights, including the right to be identified as author and the right to object to derogatory treatment of their work. Moral rights are separate from economic copyright and can't be assigned, although they can be waived in writing.

In practice, moral rights issues can arise when:

• a photographer wants to be credited for images used in your case study;
• a designer objects to a distorted or heavily edited version of their work being published;
• a freelance copywriter hasn't waived moral rights in a contractor agreement;
• a video editor or animator expects attribution; or
• your agency wants flexibility to crop, resize or adapt portfolio images for different channels.

Many agency contractor agreements include IP assignment, confidentiality and moral rights waiver wording. If yours does not, update it before relying heavily on contractor-created work in public portfolios. Otherwise, you may have client approval but still lack clean rights from the person who created part of the content.

Screenshots create another layer. A screenshot of a website, app or campaign may include your design, the client logo, third party images, platform interfaces, customer names and analytics data. Before publishing screenshots, crop or blur information that isn't necessary to show your work. Check whether any third party licences restrict public display.

Stock assets and fonts also need attention. Some stock image, template, music and font licences allow use in client deliverables but limit promotional or portfolio use. If your case study includes a hero image, video clip, track or mock-up asset from a licensed library, check that the licence allows the publication you intend.

Ownership is also a founder problem. When an agency starts informally, early work may have been created by co-founders, friends or contractors without written terms. If that work becomes your flagship case study, clean up the rights before putting it at the centre of your marketing. A later dispute with a former collaborator can be disruptive if your website, pitch deck and investor materials all rely on disputed work.

The safest position is to have a service agreement that covers client approval, a contractor agreement that secures IP and moral rights permissions from creators, and an internal checklist before any project becomes public marketing material.

FAQs

Can I Use a Client Logo If I Did Work for Them?

Not automatically. Having done work for a client doesn't usually give you an unrestricted right to use their logo. Check your contract for publicity, confidentiality and IP wording, then get written approval that covers the specific use you want.

Is a Logo Wall Different From a Case Study?

Yes. A logo wall usually says you have worked with certain clients, while a case study reveals details about the project and outcome. A case study normally needs stronger approval because it can include confidential information, personal data, testimonials and performance claims.

Can a Client Ask Me to Remove Their Logo Later?

Yes, if your agreement gives them that right or if your use goes beyond the permission given. Even where the legal position is arguable, removing a logo promptly can be a sensible commercial response if the relationship is valuable.

Do I Need Permission to Mention a Client in a Pitch Deck?

Often, yes. Private use can still be restricted by confidentiality or publicity clauses. If your pitch deck is sent widely to prospects, investors or partners, treat it as a marketing channel and get permission to name or display the client.

Can I Publish an Anonymised Case Study Without Consent?

Sometimes, but only if it doesn't disclose confidential information or make the client identifiable. If the sector, project details, dates or figures point clearly to one client, anonymisation may not be enough.

Key Takeaways

• Get written permission before using client logos, especially on a public UK website, paid ads, pitch decks or social media.
• A client logo permission clause should cover materials, channels, purpose, approvals, brand guidelines, confidentiality, duration and withdrawal rights.
• Case studies need extra checks for confidentiality, UK GDPR, personal quotes, screenshots, metrics and advertising claims.
• Trade mark use permission is context-specific, and your wording shouldn't imply endorsement, sponsorship or partnership unless that's approved.
• Portfolio rights should work with your IP clauses, contractor agreements and moral rights waivers so you actually control what you publish.
• An internal approval record can prevent disputes and help your team know which clients can be named, anonymised or excluded from marketing.

If you need help updating your service agreement, adding portfolio rights, checking a case study consent process or tightening your IP and confidentiality wording, Sprintlaw UK can help. Contact us on 08081347754 or at team@sprintlaw.co.uk for a free, no-obligations chat.