It is my understanding that casinos log our buy-in amount and or "cash-out" amount in the computer system in the pit. An article on this site (by a former floor man) stated that this system is used for rating peoples play, comps and such. It is NOT typically used to track counters and is rarely matched against any counter data base.
Question: Is this correct? If so, WHAT IS the method by which known counters are ID'd? Is there another computer system? A written list? Facial recognition? ie how do the floor people communicate with each other regarding AP's (and cheaters for that matter)?