Check out this short tutorial for step by step instructions for completing a Shop + Pay order.
Note: You should never pay for any order with any form of payment other than the Grubhub Driver Card. Your Driver Card should always be swiped as a credit card. Drivers will not be reimbursed by Grubhub for any other form of payment. If your card isn’t working while you’re in the process of checking out, tap on There’s a problem to be connected to a Driver Care specialist.