How do I use my PayPal Extras Mastercard, PayPal Cashback Mastercard, or eBay Extras Mastercard when making a purchase with PayPal?
When you pay for a purchase with PayPal, you'll be able to select your card as the payment method in your PayPal wallet and checkout as you normally would with PayPal.
You can also set it as the default payment method when you log in to your PayPal account, click Wallet and select Set as preferred.