Brand trademark infringement is trademark infringement, which means that the actor uses the same or similar trademark on the same or similar goods without the permission of the trademark owner, or other acts that interfere with or hinder the trademark owner from using its registered trademark and damage the legitimate rights and interests of the trademark owner. The infringer usually bears the responsibility of stopping the infringement, and the actor who knows or should know that it is an infringement is also liable for compensation. If the circumstances are serious, they shall also bear criminal responsibility. Complain to the Trademark Management Office of the Municipal Administration for Industry and Commerce or the Trademark Advertising Contract Management Section of the Industrial and Commercial Branch, or bring a lawsuit to the people's court. Where a request is made to the administrative department for industry and commerce, a written request shall be issued. The written request shall specify the cause of the request, the legal basis of the request, the name and address of the claimant, the name of the infringer and the place where the infringement occurred. Second, what information do you need for trademark infringement complaints? 1. Complaint: The name, address, telephone number and trademark right of the complainant shall be listed; (If represented by a trademark agency, the name, address and telephone number of the agency shall also be listed); The name, address, infringement facts and relevant information of the respondent; The legal basis and requirements of the complaint and the date of the complaint. 2. Business license and photocopy. 3. Trademark registration certificate and its copy. 4. Evidence of infringement: including infringing objects, trademarks, relevant bills, photos, etc.