Many years ago, (late 70's) I accepted a post dated check as payment for a backgammon game in lieu of an "IOU". Several hundred dollars, a significant sum in those days. More than my monthly apartment rent and utilities at the time.
The following week, after the date on the check, the bank would not honor it, claiming insufficient funds.
I tried several times over the next few weeks to cash it to no avail. Friendly efforts to contact the person who wrote it for restitution led to calls and messages not being returned, broken promises, and lies.
A 'friendly' detective working fraud told me that because it had been post dated, it was not considered a crime. A 'friendly' Assistant DA said the same thing, basically that they would not prosecute, and my only legal recourse was to sue in court. Of course, before doing that, I would need to send certified letters, etc.
I heard from others that 'his' checks had bounced. He had not been seen 'out and about' recently. Intentionally avoiding people he owed money too. Still had the same employer, 'good' job, etc.
A friendly teller I'd dated told me the balance in that account. I than deposited some cash ( about $50) into that account, and immediately cashed the check for several hundred.
Of course, things were different than. Banking was more lax. Information available if you knew who and how to ask, etc.
My point is that personal experience, although ancient history so to speak, leads me to believe that a post dated check is considered an IOU by the law (Florida anyway), and is not criminally enforceable under the bad check laws, etc.
Of course, MY interpretation includes the casino knowingly accepting a post dated check in lieu of cash and that they will hold it for XX days before depositing it.
At that point, it becomes a promise to pay, and an instrument to make it easier, but still, it is only an IOU.
Now, I do know that we read, or hear stories of people not honoring markers and being imprisoned.
"Debtor's Prison" is, I thought, no longer legal in the USA.
Far as I'm concerned, tough luck casino.