1. The cost to verify all of those would be extreme. They ship billions of units in a year, that's tens of millions of invoices at a minimum. 2. "issued only

1. The cost to verify all of those would be extreme. They ship billions of units in a year, that's tens of millions of invoices at a minimum. 2. "issued only by the OEM" but there are many valid suppliers that are not the brand owner. Even Amazon themselves buy from many vendors that are not the brand owner. Amazon wants those suppliers and third party sellers because they bring down pricing and have a wider selection than they'd get if they only allowed sellers buying direct.