N opened 1n, E DB, S REDB, then all Pass
after E led ♠akqt and took all 9 tricks, N called me and complained about not alerting DB by E, he said E should alert DB if it was a penalty, I asked them if E-W agreed to use any convention at the beginning of that round ( It was an IND tour by the way), and they said no. But N insisted that if it was penalty, they had to alert it and explain. I told them if they didnt agree any convention, like capp at the beginning and didnt have it in their profile, DB 1N normally means strong hand and equals to 1N opening hand. So I didnt adjust because of that. W also said he was not sure about the DB, but he decided to pass because of S's REDB. However, N said E-W would not bid something their p didnt know (E and W are from the same country), so he believed that they knew DB= penalty in this case.
Was I right on this? Thank you for your help in advance!
Rex

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