Open ProvincesAdvertised trademark application affecting your rights: file an admissible statement of opposition
Find the advertisement date, choose a statutory ground, identify the parties correctly and file with the fee before the deadline.
An informal protest letter does not start an opposition. Time runs from advertisement and an extension must be requested before the deadline.
Confirm the scope
Record the application number, mark, advertised owner, advertisement date and final deadline day.
Prepare the information
Tie every objection to an allowed ground and gather facts, prior rights and the opponent’s standing.
Complete the process
Create the online profile, complete the statement, identify any agent and pay the prescribed fee.
Keep follow-up records
Keep confirmation and a calendar for service, evidence, cross-examination, submissions and hearing.
Trademark opposition e-services — CIPO
Sources and limits
Official sources are linked in the guide. Checked August 29, 2026; confirm current rules, forms and deadlines with the responsible authority.
General information based on federal and national rules; provincial rules may differ. Confirm with the official body before acting. Last reviewed : 2026-08-29.