Amazon Prime Day is one of the busiest times of year for Flex drivers as they deliver packages. Some are planning early shifts.

Since Amazon Flex drivers are independent contractors -- they use their own cars set their own schedules -- an additional layer of verification could help Amazon keep tabs on its workers.

Starting today in Seattle, Amazon Flex will pay part-time drivers to deliver Amazon's Prime Now packages. Drivers will get paid between $18 and $25 an hour to work for Amazon. In order to become a ...