I was researching Amtrak travel. It turns out that there is an unusual notice in some of the menus.
It says “If you paid by cash, credit card or traveler’s cheque and did not receive a recept, your purchase is complementary.”
Please translate. I’m thinking that it doesn’t mean that the servers withhold a recept as a complement. “Gee, this customer’s tie is really awesome. Don’t give him a recept.”