The case is described by South. I was the arbiter and was called by East after 3 diamond X. I said, the bidding and play should go on. and I will judge the case at the end of the (club) tournament. (I played myself and didn?t know, if I played this hand allready)
After the game North admitted he had given a wrong information: ?It was a mistake, but an honest one?
The attachment contained the following:
#1 Double was alerted as DONT = long suit
#2 2 ♠ were alerted as transfer to ♣.
#3 When the bid comes to West, East calls the TD and tells him that North has given a wrong information. Now, everybody at the table knew that Easts suit is ♣, on what West took the bid to 4 ♣ and got doubled again from North.
If West would pass, North then bids 3 ♣ and me on South, I will pass, with the knowledge that we definitely get a bottom in this hand. I think Im not allowed to bid my Spades or Hearts again, to tell Partner that he was wrong (we have not played together for a long time and we have taken a simple system and we did not talk about, what we are going to bid in such a situation).
The contract ended 3 down, doubled for 800 for N/S and finally the TD came back to our table and wanted to correct this result into 40% - 60%. After intervention that East and West have taken incorrect actions at the table, the TD did corrected the score to 40% - 50% with the explanation: North has given a wrong information and for this, N/S get penalized anyway.
For me says this now that: whenever someone gives an information (and I know it is wrong), I call the arbiter and me and my partner can bid any rubbish we want, the opponents get anyway a bad score and we are scoring at least 50%. Can this be the truth?
Another person had given a view:
Funny story but TD's decision is wrong : once there has been a misexplanation (not a misbid ! ) the non offending side is protected unless they take an inappropriate action before the TD is summoned ( in this case ,East should not have reacted in anyway and his side would have obtained an adjusted score ) . But as he tried by his remark to tell his partner that his suit was Clubs , he is not protected anymore and fully deserves his bottom at NS + 800 . As for the NS pair , the TD MUST make himself sure whether the 2S bid was a misbid ( NS play effectively as a transfer to C ) in which case ther will be no penalty against the NS or whether 2S is natural in the system in which case N gave a wrong explanation of the system and should be penalized at the discretion of the TD ( personnally I would have penalized 25% of a top ) .
All this mess was created by East and if he had stayed quiet he would have got an adjusted score probably if the explanation was wrong .
Hope I clarified some points
My correspondent then wrote again:
Thank you for answering so fast, but I am still confused:
My consideration as arbiter was the following:
According to § 75 C. I have to assume misinformation rather than misbid, I had no of evidence to the contrary.
According to § 75 B. I shall award an adjusted score.
As the bidding went: 1NT ? X: meaning a good long unknown suit, min. 6
South 2 Spade, alerted, after asked, North said transfer to clubs (min. 6)
Now West bid 2 Diamonds.
I asked myself: did West according to §12 C1b) as the non-offending side contribute to its own damage by a serious error (unrelated to the infraction)?
I came to the conclusion: No, because his partner must have diamond, heart or spade, because clubs were excluded. So he hoped to play in a 10 or 11 fit or in worst case in an 8 fit (spade). If the spade by South were real, West needed to pass or bid 3 Clubs, but never 3 Diamonds. So 3 Diamond was clearly a bid caused by the misinformation.
Now North doubled the 3 diamonds and East called the arbiter.
In the rules of 1997 there was a sentence in Law 75 D2. that the arbiter should only be called at the end of the game. It didn?t say anything what happend if the arbiter was called before. In the new laws of 2007 this remark is gone.
In the moment the arbiter was called by East it was clear that the game could not be finished. East gave UI to West and he bid in a sort of panic 4 Clubs.
Apart from how do you rule [and I have more than one idea myself

Help

....... 1NT Dbl#1 2♠#2
3♦.... Dbl ...P... ...P....
4♣#3 Dbl ...P... ...P....
...P...