Have you ever been to a fast food or any restaurant that advertisers some sort of special with a coupon..they most always say” present coupon before ordering “

Now let me ask you have you ever ordered the food item at some eatery and item on sale but or presented it to them as your paying and they give you  a bit of an agreement time “hey you were supposed to present the coupon before ordering”

The simple reason is that when you have a coupon for let’s say a sandwich when you present the coupon  upon  ordering they have a smaller sandwich to give you..So be smart..always give the restaurant the coupon after they serve you  when you pay the cashier