These materials include business registration certificate, tax registration certificate, company business license, company bank account certificate, power of attorney, and supplier information form. These materials are the basic requirements for Amazon purchases. The business registration certificate is proof of the company's legal operation, the tax registration certificate is proof of taxpayer identity, and the business license is proof of the company's legal rights and interests. The company's bank account certificate guarantees the validity of the payment, the power of attorney is used to authorize Amazon representatives to make purchases, and the supplier information form is a statement and description of the purchased products and services. By submitting these materials, Amazon can understand the basic situation and product information of the supplier, providing guarantees for the cooperation between the two parties. At the same time, suppliers should also keep updating this information in a timely manner to ensure effective cooperation and communication.