Getting back to the topic of "casino credit" or markers: yes, it is an interest-free, no-fees, line of credit that was established between you (and your bank accounts) and the casino. Each marker is essentially counter checks that you sign, and are legal instruments of your financial obligation(s). If you have no money to fulfill the marker in your bank account, then you are not only in trouble financially, but also criminally charged in the state of Nevada (maybe other states too!?). The casino you deal with should provide you with their policy of when they make deposit of your marker. Of course, use markers/casino credit responsibly and never overbet!!! There's been shocking data that say some players have gambling loss over a lifetime (whatever that means) to be anywhere from $59k to $99k:sad: !
Re: taxes; yes, all US citizens are required to declare any income they earned from gambling, whether it's from slots, jackpots (W2G), table games. The sucky part: say you won $25k but lost $50k in the year; you still have to report $25k income; then itemize your loss, upto the amount of the winning income. So, if you lost and no winnings in the year, you cant do anything.