I believe it was at this McDonald's that I was deliberately short-changed without a recepit. This is a big tourist point where daily sales must easily reach five thousand. These guys are probably trying to cover a simple operation to rip people off.

If I recall correctly (murky here, I didn't really care and may be mixing this with another memory or a different location) the cashier even nonchalantly covered the front-facing display with his hand (this actually took a very unusual gesture), so I couldn't see what the entered amount was. I paid in cash, the sum was tiny, and I didn't really care. It's McDonald's.