Mistaken muck returned by dealer

[Randy_Refeld]

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Although I often announce a call or a check if I think it will keep the action moving, I have generally understood that a dealer is expected to only announce bets/raises.

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This is generally correct. On the end it is appropiate to say "he called you" to the player that bet when he is called in exactly one spot both to be sure he saw the call and to let him know it is time to show the cards.

edit to add: In a high limit game the dealer should be silent unless he needs to say something. Example if the dealer announces a bet in a 300-600 more than one player will say "shut the [censored] up and deal."