A trademark application filed by an applicant can be opposed by any person for various reasons during the trademark application stage. The person filing the opposition need not have any commercial or personal interest in the matter or be a prior registered trademark owner.
According to Section 21 of the Trademark Act, “any person” can file a trademark notice, irrespective of commercial or personal interest in the matter. The question of bona fides of the opponent does not arise. Hence, trademark opposition filing can be filed by a customer, member of the public or competitor or any other person. Also, the person filing the trademark opposition need not be a prior registered trade mark owner.