The Bettor Forgot to Bet (Article ID 139)
Abstract: When a Bettor forgets to make his bet either in writing or on a betting device, he is penalized by having to pay the winner as do the other players.
Question from a player: Explain what happens if the Bettor forgets to bet?
Answer from the NMJL: “If Bettor neglects to bet, the Bettor must pay the winner, as the privilege of a winning bet is lost.”
Source: National Mah Jongg League Bulletin Q&A 1987 http://www.nationalmahjonggleague.org