Passing Off in UK Law: What It Means for Your Business

What is passing off?

Passing off is a common law tort (a type of civil wrong) that protects unregistered trademarks and business names in the UK. If someone trades under a name similar enough to yours that customers are confused, you may have a passing off claim, even if you do not own a registered trademark.

Passing off has existed in English law for over 150 years. It developed through case law to protect businesses from unfair competition, and it remains an important legal tool today.

The classic trinity test

To succeed in a passing off claim, you must prove three elements (known as the "classic trinity" from the Jif Lemon case):

1. Goodwill. You must show that your business has built up goodwill in the name. Goodwill is the attractive force that brings customers to your business. Evidence includes trading history, customer numbers, revenue figures, advertising spend, and media coverage. The longer you have traded under the name and the more customers you have, the stronger your goodwill.

2. Misrepresentation. You must show that the other party's use of a similar name amounts to a misrepresentation, whether intentional or not, that is likely to make the public believe their goods or services are connected with yours. This does not require proof that every customer is confused, just that confusion is likely among a substantial number of people.

3. Damage. You must show that you have suffered (or are likely to suffer) damage as a result. This could be lost sales, damage to reputation, or dilution of your brand. In practice, if you can prove goodwill and misrepresentation, damage is usually presumed.

Passing off vs trademark infringement

The key difference is the burden of proof. With a registered trademark, you simply need to show that someone is using an identical or similar mark for similar goods or services. The trademark registration itself is your proof of rights.

With passing off, you must prove goodwill from scratch. This means gathering evidence of your trading history, customer base, and reputation. It is harder, slower, and more expensive.

This is exactly why trademark registration is recommended wherever possible. It transforms a complex passing off case into a straightforward infringement claim.

Practical considerations

Passing off claims are typically brought in the High Court or the Intellectual Property Enterprise Court (IPEC). IPEC is designed for smaller businesses and has a costs cap of 50,000 pounds, making it more accessible than the High Court.

Before going to court, most businesses start with a cease and desist letter. Many disputes are resolved at this stage, especially when the evidence of goodwill is strong. Court proceedings should be a last resort due to the time and cost involved.

Protect yourself proactively

Do not wait until you need to rely on passing off. Register a trademark to give yourself clear, enforceable rights. And run a free brand scan at GuardMyBusiness to find out who else is using your business name before confusion starts.