Core Viewpoint - Consumers are encouraged to check complaint information before making purchases, especially for service-oriented or prepaid transactions, to avoid potential issues and losses. Group 1: Official Channels - The most authoritative information source is the official platforms established by market supervision departments, such as the "National 12315 Platform," which provides access to enterprise credit information and complaint records [2][9]. - Consumers can find basic information about companies, administrative penalty records, and lists of businesses with abnormal operations or serious violations, serving as an "official health report" for enterprises [2][9]. - Local consumer associations also publish consumer warnings and complaint analysis reports, highlighting problematic industries or businesses [2]. Group 2: Industry Supervisory Platforms - Specific industries have dedicated complaint disclosure or service evaluation systems established by their supervisory departments or industry associations, providing more focused information [3][10]. - For online transactions and e-commerce, platforms like Taobao and JD.com have their own complaint handling channels and merchant credit rating systems, which are primary references [3][11]. - In financial services, consumers should check risk alerts or complaint reports from the People's Bank of China and the National Financial Regulatory Administration [3][11]. - For telecommunications, the Ministry of Industry and Information Technology's complaint handling center (12300) provides authoritative channels and publishes complaint rate rankings for telecom companies [3][11]. - In transportation, issues with ride-hailing services can be reported to the Ministry of Transport's complaint hotline (12328), while disputes over flight or train tickets can be addressed through the Civil Aviation Administration and the National Railway Administration [3][11][12]. Group 3: Third-Party Complaint Aggregation Platforms - Third-party platforms like "Black Cat Complaints" provide real-time user feedback on consumer experiences, aggregating a large number of complaints to reflect merchants' attitudes and efficiency in handling disputes [5][13]. - The platform allows users to search for specific brands or merchants to view detailed complaints, response rates, and resolution outcomes, offering valuable insights before making purchases [5][13]. - Black Cat Complaints publishes monthly "Red and Black Lists" based on complaint volume, response rates, and resolution rates, helping consumers identify problematic merchants [6][14]. - Users can track the progress of their complaints through the platform, ensuring transparency in the complaint handling process [6][14]. Group 4: Summary Recommendations - To mitigate risks, consumers should verify the legitimacy and credit of merchants through official channels like the National Enterprise Credit Information Publicity System [7][15]. - Consumers should check industry evaluations by consulting relevant supervisory agencies or associations for complaint disclosures or service quality announcements [7][15]. - It is advisable to search for user feedback on third-party platforms like Black Cat Complaints to assess merchants' service levels and integrity [7][16].