Well as Thomas said they require you to carry your resident card at all times, I was actually checked once by police (just once) they can legally do that at any time. It's just a pain and the staff has to know what a resident card looks like and understand when someone wants to show it. grandma's restaurant has probably never seen one before. Maybe my number would work better. extra fees to see tourist spots is easier let the locals have a "discount" if you like. eateries I don't get it.