How do I use MasterPass to buy something?
Once you have filled your online shopping cart and are ready to checkout, click on the 'Buy with MasterPass' checkout button and select your MasterPass wallet.
Sign-in may take place on the checkout page or you may be redirected to MasterCard to complete the sign-in process. Once signed-in, you can choose from your list of stored payment cards and shipping addresses. If you wish to use a card or shipping address that you haven't already added to your MasterPass, just click or tap the Add option.
Once you choose your card and shipping address, you'll have an opportunity to review your order before completing checkout.