Sigh. Ah, marks.
OK, here's the thing. A scam is only successful if, when a potential mark NOTICES the scam, it can be explained away. Sure, the receipt was only folded. Yup, that's right, only folded - nothing too odd, or remarkable. So most of the time, the mark - I mean, customer - just unfolds it, reads it, and signs it. But ah! SOME of the time, the mar . . sorry, customer, DOESN'T unfold it, and just writes down a tip and total. And the grifter makes bank.
What would be the possible reason for folding the receipt in that fashion? Seriously, what possible reason? None, trust me. What I find vastly amusing is the number of people here who, hearing what transpired, will still say that nothing out of the ordinary happened, that the OP should have remembered that the tip was included, that the server did nothing wrong, how dare we accuse him . . . what are you all afraid of? A little knowledge? A little way to protect yourselves from the folks who want to take advantage of you? Go ahead, assume that everyone is just as honest and wonderful as you all seem to be.
Me, I'm keeping my eyes open, even in the happiest place on earth.
KC