Look for the contactless payment symbol or Apple Pay logo at payment terminals or online checkout.
Place your finger on the Touch ID button and hold your phone near the payment terminal. When payment is complete you'll see a checkmark and confirmation message on your screen.
Online (using an Apple device equipped with Touch ID)
Certain merchants accept Apple Pay online. Look for the Apple Pay button at checkout. When you've verified your shipping info and are ready to pay, place your finger on the Touch ID button and wait for the checkmark/confirmation message to appear on your screen.