A discouraging bid suggesting that the partnership should progress no further. Usually a sign-off occurs after a trial bid or asking bid. When the person making the sign off made an asking bid on the previous round, the sign off is more a command than a suggestion.
In each case, West’s final bid is a sign-
off. In the first auction, it looks as if East has made a game try, which West has declined. East would only bid on if in fact he had aspirations towards a slam. In the second auction, East has suggested a slam and West has shown no interest.
In the third and fourth auctions, West has found out how many aces are missing and placed the final contract.