It gets kind of difficult, but all casino have a Multiple Transaction Log (MTL). When an individual player has a CASH transaction or a series of them, usually at $3000, he is added to the MTL. All departments are made aware of this and surveillance usually takes the lead on the tracking. When his cash transactions breaks $10,000 everything stops and he is asked for an ID if he is unknown and his information is not on file. Once the ID is secured gaming can continue. If he refuses, he is no longer, allowed to play and all transactions are stopped. His picture will be taken and a SARC will be filed(Suspicious Transaction Report). Structuring is illegal and similar reports are filed. All casinos and all state and tribal regulators are very serious when it comes to cash reporting. The fines are huge and it is one of the few areas where individual casino employees can be punished.