There are several possible reasons for the existence of multiple buyer accounts on Amazon: 1. Businesses and individuals have registered multiple accounts on Amazon. These accounts can be registered with different email addresses, phone numbers, credit cards and other information, and this information can also be the same. 2. In some cases, Amazon may automatically create a new account. For example, when you change your email address or name, the system will treat them as different accounts and create a new account. 3. Amazon's platform allows users to purchase goods with different identities. For example, a company can purchase with its own account, and employees can also purchase goods with their own accounts. Although Amazon allows multiple buyer accounts, each account needs to be managed independently, including orders and payments. Users should pay attention to managing and protecting their account information to avoid leaving opportunities for criminals.