1. See if the package is intact. Complete packaging is different from sealed packaging. There are photos on the internet.
2. Unpack the codes to see if the three codes on the packaging box, warranty card and machine are consistent;
3. Check the warranty period, you can go to Apple official website to check. The warranty period can simply prove whether the product is refurbished or brand-new unopened. The first activation starts with a one-year product warranty, so it is the most important point for users to identify the iPad by querying the product warranty through the serial number.