Went to a great restaurant last night. I paid in cash and with a card. The birthday cash had been contributed by a couple different people so I wanted to make sure I visibly used it. The waitress seemed baffled by how to process the check with cash and card. Having been a waiter and bartender for many years in the past, I knew it wasn't such a hard thing. Then when she came back with the little hand held machine for me to sign for my charge, and I suddenly knew why she was stumbling. The way tips are processed these days are through the buttons on that little card machine. And since she only run the card for only like $40 of a $300 tab, the suggested tip, even at 25% was only a few bucks. Luckily, I noticed this and used the "Custom Amount" option to write in a proper tip for the whole bill. You should have heard the sigh of relief from her when she saw I took care of the tip. I felt bad, but also relieved that I didn't miss it and put her on the spot to make her ask for it and be forced to explain the situation to me. Or worse yet, leave the restaurant unaware I stiffed her and then come back sometime in the future. lol Can't tell you how many times the patrons who got the worst service from me, were the ones who gave me the biggest tips.