We once had a story where someone ordered a sandwich and the person making the sandwich put in one wrong salad ingredient and the guy called up asking for a refund so we told him to bring back the sandwich with a bite in it (we knew he lived a block away) and then he mumbled something about finishing the sandwich already.
Thats ridiculous.
I used to work for a restaurant and I delivered a pastrami sandwich 45 minutes bc we forgot to put on mustard and a chicken leg an hour bc it was left out of the order. These were both take out orders btw.
This restaurant also has a policy to provide a full refund if the customer complains that they didn't like the dish they ordered.
People don't forget when you provide excellent service.