The following can be grounds for cancellation:

• bad faith
• the mark is generic
• the mark is descriptive
• expired registration
• the mark is misleading, deceptive or disparaging
• the mark is functional
• use of protected armorial bearings, flags and other State emblems
• use of a geographical indication
• inclusion of a badge or emblem of particular public interest
• express renunciation by the owner
• unused trademark for five consecutive years
• the mark is contradictory to public policy or principles of morality
• registration was declared as invalid by a competent authority