depositing and cashing out large sums

[Little Lew]

I'm researching for a novel. Trying to get some info about casino regulations and haven't received any response from NJ Gambling Commission.

Would appreciate any feedback on these questions:
Do casinos track the identities of buyers of large amounts of chips?
If so, what is the threshhold for tracking?
What about cash-outs?
Does the IRS intervene in large cash-outs?
What about documentation of winnings for tax purposes? (no laughing here)

I would appreciate any responses or directions where to get this info. Would go to AC to talk to casino peole directly if I were confident I could find someone who could give me an authoritative answer.

Thanks in advance.

LL