The answer to whether I need authorization to buy and sell goods on Alibaba is not absolute, because it depends on many factors, including the types of goods you are dealing in, the brand, and the specific requirements of suppliers on Alibaba. I will explain these factors in detail below to help you better understand this issue. First, you need to understand whether the goods you are dealing in have brand protection. Brand protection refers to the restrictions and controls on the production and sale of goods by brand owners in order to protect their brand image and intellectual property rights. If your goods fall into the category of brand protection, you may need to obtain authorization from the brand owner during the purchase and sale process. Secondly, you need to check the requirements of suppliers on Alibaba. Some suppliers will require authorization from buyers to ensure that the buyers comply with their sales policies and brand image. In this case, you need to communicate with the supplier to understand their specific authorization requirements and operate in accordance with the requirements. In addition, you also need to consider the laws and regulations in your area. In some areas, selling certain goods may require a license or qualification certification from the relevant department. If your goods fall into this category, you need to comply with relevant laws and regulations and obtain the necessary licenses or qualification certifications during the purchase and sale process. In general, whether authorization is required depends on multiple factors, including product type, brand, supplier requirements, and laws and regulations. In order to ensure that your business operations are legal and compliant, it is recommended that you fully communicate with suppliers, understand their specific requirements, and comply with relevant laws and regulations. At the same time, you can also consult professionals or lawyers for more accurate legal advice and guidance.