Phones4u Ltd v Phone4u.Co.UK: Court of Appeal revives passing off claim over domain name
Phones4uvPhone4u.UK
- Court
- Court of Appeal
- Judgment
- 19 May 2006
- Citation
- [2006] EWCA Civ 244
Goodwill for passing off is judged differently from distinctiveness for a trademark, and the two can point different ways.
Phones4u sued the operator of phone4u.co.uk over the near-identical name. The Court of Appeal found passing off, though a separate trademark infringement claim still failed.
What happened
Caudwell, trading as Phones 4u, sued the registrant of the domain name phone4u.co.uk for passing off and trademark infringement. The trial judge dismissed both claims. The judge found Caudwell had not proved enough goodwill in the name by 1999, treated evidence of confusion as insufficient, and held that the colour limitation on the registered logo meant use of the bare words did not infringe. Phones4u appealed the dismissal of both claims to the Court of Appeal.
What did the court decide in Phones4u v Phone4u.UK?
The Court of Appeal held the trial judge had wrongly applied a trademark style distinctiveness test to the separate question of goodwill needed for passing off, and had wrongly inferred there was no deception simply from years of co-existence, without properly weighing how little the defendant had actually traded. It found passing off was established, including on the basis that registering the confusingly similar domain name was an instrument of fraud. It upheld dismissal of the trademark infringement claim, because the registered mark was validly limited to specific colours, so use of the bare words fell outside what the registration covered.
What we learned from this
- What I'd take from this is that goodwill for passing off and distinctiveness for a trademark registration are not the same test, and a business can win on one while losing on the other, as happened here.
- If you accept a colour limitation to get a trademark registered, check what that limitation stops you enforcing against later, including use of the same words in black and white or a different colour.
- A near-identical domain name can itself be treated as an instrument of fraud in a passing off claim, separate from how the site is actually used.
- Don't assume long co-existence of two similar names proves there's no confusion. The court may look at how much the smaller business was actually trading, not just how long it existed.
Things to be aware of
- The trademark infringement finding rests on the specific colour limitation accepted for this particular registration and Registry practice at the time, so it doesn't mean colour-limited marks can never be infringed by monochrome or textual use in other cases.
- Passing off still requires proof of goodwill, misrepresentation and damage; this case turned on the judge's approach to goodwill evidence, not a relaxation of what needs to be proved.
The businesses involved
Phones4u Ltd
UK mobile phone retailer trading as Phones 4u. Brought the passing off and trademark infringement claim over use of a near-identical domain name.
Phone4u.Co.UK
Registrant and operator of the phone4u.co.uk domain and associated internet business, sued by Phones4u Ltd over the similarity of its name and domain.
What others said about it
- The Register reported the Court of Appeal's finding that use of the near-identical name 'caused deception', underlining the practical harm behind the passing off ruling.Source: The Register, October 2006
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This page is for information purposes only and does not constitute trademark advice or guidance. Summary drafted with AI assistance from the published judgment and checked by The Trademark Helpline (how we write these). Judgment: [2006] EWCA Civ 244 on Find Case Law, published under the Open Justice Licence. Company details from Companies House; trademark counts from the UK trademark register. Last reviewed 27 October 2026. Report an error.
