In poker, the term "check" indicates that a player hasn't made any wager during their turn. If everyone has placed a bet in the previous turn, the players must choose between three actions which are: Raise  Call  Fold Checking is not applicable during this turn since everyone has placed their bets in the previous turn. Bookkeepers can use check-back when a check appears during an in-position. This is easy to spot since you need a player that doesn't follow the action correctly. Keep this in mind before you start playing at an online Singapore casino.