After you register an eligible rewards credit card with your account, your Shop with Points balance can be used at checkout.To order with Shop with Points:
Note: Amazon.com Rewards Visa Cards are automatically registered in Shop with Points. If you've recently used an eligible Discover card to make a purchase on Amazon.com it will be automatically enrolled unless you've previously disabled the card for use with Shop with Points or you've asked Discover card not to share personal account information with third parties.
Note: If you don't have enough rewards points to pay for your order, you can use the associated credit card, Amazon Gift Card, or Amazon Payments account to pay for the rest of your order.
Note: The rewards points you redeem will be deducted when your item is shipped, not when your order is placed. Your rewards points balance does not reflect redemptions for pending purchases.