W-2's Vegas Casinos Will.....

on a single jackpot of $1200 (i believe its that amt. or close to it) on a slot machine, you need to fill out a w-2.  on table games, you do not need to do a w-2 on any amount unless you are playing a game that pays you out something like 500/1 odds(not exact on odds)  like let it ride (royal flush payout), pai gow poker (with envy bonus).  you definately do not need to fill out w-2's on winnings in blackjack, 3-card poker, baccarat, roulette because they don't pay those kind of odds. 

bronco has pretty accurate info. I bet 5k on a Winky Wright Boxing & they just asked for my license. Have won over 10k multiple times (in smaller increments like 2500 or 1k at a time & never had to do a W2 form)

forgot to mention that you can even go with 30,000 in chips to the cashier and request a check instead of cash if you would like.  but some casinos do ask for id's or player cards to verify that you did win that money and not owe any markers etc.  But say you do hit a royal flush in let it ride, they verify there was no cheating, and then bring you a w-2 right away before you actually get paid.  Same goes with pai gow poker with bonus envy, if say you hit 5 aces or 7 card straight flush they bring you the w-2 right away.

A buddy hit a 3k jackpot, and 2k jackpot at Monte Carlo last May. He had to fill out a W-2 both times.

vegassound, its not about going from casino to casino and trying to win a bit in each so you dont have to fill out a w-2.  you could win a million dollars in blackjack, roulette, baccarat, 3 card poker etc on one table and not have to fill out a w-2 as long as it dosent pay you out big odds like let it ride and pai gow poker with envy.  blackjack and baccarat is basically even money, in roulette the most you can win is 36/1, and in 3 card poker the most is 40/1 unless you play the variation with the mini royal which is 50/1.  it dosent matter how much you win and cash in as long as it dosent pay out those huge odds. ive sat at blackjack tables and baccarat tables and gotten up off the table being up over 10,000 and had no problem cashing all at one time and not filling out a w-2.  the only time ive had to fill one out is when i hit a slot machine at mgm in vegas for $8,000 while there for the ne/carol superbowl.  But i did use to think like you that over 10,000 you would be w-2'd so id have friends take a few thousand each to cash out until i was told the rules by pit boss's and my casino host's. but in poker tourney's they do make you fill out a w-2 but im just not sure on what kind of prize pool you have to fill it out for.