On the other hand, A trademark opposition is a legal proceeding in which one party attempts to put a stop to a trademark application from being granted. A trademark opposition is filed by third parties who feel your trademark could in some way impact them or their own trademark, in writing, in the form of a notice, with the trademark examiner. If the examiner sees any merit to the opposition, they are to forward the notice to the applicant, who is required to send in a counter statement to the Registrar within 2 months.

If the Registrar feels the counter statement addresses the opposition substantially, they may dismiss the opposition. Alternatively, if the registrar feels there is more to be weighed, they may call for a hearing with both parties appearing before them and presenting their cases. After the hearing, the Registrar will rule on the validity of either the application or the opposition. This ruling can be appealed before the Intellectual Property Appellate Board within 3 months of it being made public.