When you win a substantial amount, a casino employee, often called a "slot attendant," will come to verify the win and process the payout. They may ask for your identification and information to ensure the jackpot is legitimate. In most cases, the casino will pay out the ja.
The odds of winning a larger Jackpot (Spot 10) are 1 in 8,911,711 whereas the odds for winning a smaller Jackpot (Spot 7) are 1 in 40,979. The odds will differ according to the games you play - but in all games of chance the odds are against you winning the jackpot or big prize.