Requirements for classified audit related information. 1. authorized general UPC code. 2. Receipts, invoices and packing lists: they must be valid documents within 90 days (the effective dates of specific categories are different); Contains the address and contact information of the supplier. 3. Relevant certificates: electronic CE certificates; FDA certificate of cosmetics and skin care products, nickel content certificate of jewelry. 4. Corporate website: It must be a corporate website with a first-class domain name. Note: There are some special categories that need to be sent to Amazon for testing. For example, the classification audit of FineJewelry requires a processing fee of $500, which is non-refundable (whether your classification audit is successful or not), and the products they need need need to be sent to their testing department for testing.