The Crown Card might sound fancy, but it's basically the restaurant's nickname for a gift card. You purchase the card and load funds onto it, then you spend those funds at Burger King. Crown Cards can also be used to place mobile orders. You simply need to input the information at the checkout screen. When you order in person, the card can be used exactly like your credit or debit card. You can also load more funds onto a Crown Card when you're running low. Burger King notes that unless your state requires it by law, you won't be able to trade your Crown Card back in for cash. So you should only load the funds that you know you'll be spending at BK. Most often, the cards are used as stocking stuffers or birthday gifts for others.