Knowledge Hub · Updated 13 October 2026
Trademark Knowledge Hub
Free, plain-English help with UK trademarks, from the team that has been registering and protecting brands for UK businesses since 2008.
Everything we publish is here in one place: step-by-step guides, answers to the questions business owners ask us most, trademark news, real client stories, scam warnings and short videos. Search for your question, filter by topic, or start with what other readers are looking at this week. If you can’t find what you need, ask us and a specialist will reply within one working day.
What is trademark invalidation?
Invalidation is the legal procedure for challenging a trademark that the UK IPO or the EUIPO has already registered, where it looks like, sounds like or is spelled l…
What is the difference between a trademark opposition and an invalidation?
The difference is timing. An opposition challenges a trademark during its application stage, aiming to stop it being registered at all, which is why early detection…
What grounds can be used to invalidate a trademark?
The most common grounds are earlier rights, lack of distinctiveness and bad faith. Earlier rights apply where you own a prior trademark or were using a similar mark…
Which form is used to invalidate a UK trademark?
A UK invalidation is filed with the UK IPO on Form TM26(I). For an EU trademark, the equivalent is an Application for a Declaration of Invalidity at the EUIPO. We he…
On what grounds can a UK trademark be cancelled?
The most common ground is non-use: a trademark that has not been used for a continuous period of five years can be challenged and cancelled. A registration can also…
What is the difference between trademark cancellation and invalidation?
Cancellation generally applies to a trademark that was validly registered but should now be removed, for example because of non-use or a voluntary request. Invalidat…
How do I defend my trademark against a non-use cancellation?
The burden of proof sits with the owner, so the key is evidence that the trademark has been used within the past five years, or a valid reason for the lack of use. W…
Which form is used to cancel a UK trademark for non-use?
A non-use cancellation at the UK Intellectual Property Office is filed on Form TM26(N). For an EU trademark, the equivalent is an Application for Cancellation at the…
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Jonathan PatonFounder & CEOBrand protection strategy for UK businesses since 2008.
Matthew GriffithsCommercial DirectorClient work and our UK and international partnerships.
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