Again, what you just wrote is related to the "display on your screen" bit. But regarding the "record on their database" bit, you use credit cards and you KNEW

Again, what you just wrote is related to the "display on your screen" bit. But regarding the "record on their database" bit, you use credit cards and you KNEW that gets recorded in some payment gateway database somewhere. It has nothing to do with Walmart. You just don't like the hassle of using cash.