I had my own version of this while directing a club game back on January 22 regarding Boards 7 and 10 of the afternoon Common Game with the king of spades as the extra card.
Board 7:
https://bridgewinner...-01-22-board-7/
Board 10:
https://bridgewinner...01-22-board-10/
Less than 10 minutes into an 8x3 bye-stand relay (share) game, Table 3 calls me during their first board (Board 7).
♠K led by North against a 3
♥ contract and I was called when the
♠K also appeared in dummy! Some severe underbidding by East caused them to stop in the partscore with an auction where East opened with a "balanced 19 points" and only raised the 1
♥ response to 3
♥. I removed the
♠K from dummy and declarer scored 11 tricks for 200. I did not adjust the score nor did I give a procedural penalty due to East not counting her cards.
I then warned all the players to be very careful to count their cards and to especially watch for a hand with only 12 cards with green backs. But my warning was too late:
At Table 4 on their first board (Board 10), North raised her partner's 1
♥ opening bid to only 2
♥ holding
♠932
♥A986
♦KJ10
♣53 because she didn't realize she held only 12 cards and she should have been holding the
♠K that the East hand of Board 7 possessed (until I took it away at about the same time that Board 10 was being completed at Table 4).
Of course, I can't count that result since there was never a time when all players held at least 13 cards. I gave A+ to the opponents and A- to the offenders, plus a tiny one matchpoint PP. (That was still better than the zero they thought they would receive!)
We never did figure out how boards were made with our dealing machine ending with a card in the wrong directional pocket and in a board not even adjacent in number.