For the last 15 years or so, all employees that dealt with money transactions were required by the IRS and them later the IRS and Homeland Security to take a class and pass a test about tracking transactions.
Tracking the transactions and recording the transactions in a Cash Transaction Log (CTR) was not optional, it was the law. We were threatened with fines and arrest if we did not obey the laws, and the casino was threatened with fines.
We were also not allowed to discuss this with the casino patrons. There was a brochure we could give them if they asked any questions, but we could not discuss the tracking. That was also the law.