Click here to read a MakeTechEasier article called "How to Add Your Passport or Other ID to Google Wallet"
See this page for full details of how the Google Payment System works
Look for these logo on the payment terminal screen or the cash register.
Google Pay Symbol & Contactless Symbol
Making a payment with your phone in a store
Step 1: Wake up and unlock your phone so that the home screen is visible
Step 2: Hold the back of phone close to the screen for a few seconds. When you're done paying, you'll see
a BLUE CHECK MARK on the screen
Step 3: If prompted, follow any instructions on the screen.
Checking payment details
Use the Smartphone App to see details of any recent recent transactions from linked credit card[s] and set up various 'loyalty' options.
Use a browser to see your Activity at Google Pay