exist.

The network is not good when buying coupons, causing network abnormalities, or everyone is buying during the meal time, causing network congestion.

In this case, if you refresh it several times, as long as the payment is successful, the coupon code will be displayed.

The McDonald's coupon code is the code on the McDonald's coupon. Each McDonald's food has a coupon. The coupon for each food will have a number. When you receive a McDonald's coupon, you actually receive a McDonald's coupon code. At McDonald's

Just tell the restaurant the McDonald's coupon code to get the discount.