I often leave the server a cash tip, even when I pay with a credit card. I figure the server can then do with it as he pleases. I have two questions. Is this a benefit/appreciated generally by the waiter? Does it ever look bad to the servers supervisor if they see a credit card receipt with no tip on it, possibly making the supervisor think the server did a poor job and got no tip? Does it matter at all? OK that's was there questions.