US Patent 9940616 Verifying proximity during payment transactions

Method, systems, and apparatus for processing a transaction for a customer using a first device and a second device, comprising: receiving a notification from the first device, where the notification includes a selection of one or more items for purchase, where the notification includes an identifier, and where the identifier uniquely identifies both the customer and a second device; determining that the second device is in proximity to the first device as an authentication measure; in response to the determining, sending the determination to the second device, where the second device displays details regarding the selection of the one or more items for purchase; receiving, from the second device, user input indicating a confirmation of the purchase of the one or more items; submitting, to a payment processor, the details for authentication.