Hopefully this will be a rare event. But it is bound to happen to even the best product range in the world. It is usually best to give in graciously and process things promptly. Here is what to do.
To complete this recipe we first need a customer to buy something and then request a refund. You could get a friend to make a purchase and then refund it as a practice run for when you get the first real refund request.
So we have our first grumpy customer and the only way to appsease them is to give them their money back. The following steps explain what to do: