Simple mistakes 7. Not giving the driver the coupon. If you use a coupon, you need to give it to the driver. Some customers try to keep it and hope the driver won't notice. Please don't ask if you have to turn it in. The store rules say we have to get it. Some drivers will have to charge full price if you don't have it. It is best to have the coupon ready in advance. When you prepare the money in advance, this is a good time to get the coupon and keep it with the money. If it's someone who usually tips big, I may bend the rules and let the coupon slide. That's one of the advantages and benefits of being a tipper. If it's a customer who doesn't tip, I won't move until I get the coupon. I'll call the manager or make them sign something. Sometimes the store management is very strict and I have no choice but to get the coupon, anyway. Last updated: August 7, 2008