When you win a jackpot, you win a jackpot! Joking aside, there will be some stipulations when you want to withdraw a large sum of money. Most casinos cannot pay large sums immediately, which is why you’ll typically get your winnings in installments.  The important thing is that all good casinos have specifically defined rules and processes for paying out jackpots, and you can always see them on the site or ask customer service for more info.