At the weekend, we were playing in an inter-club county competition in Manchester, England when my partner made a claim for the rest of the tricks with 3 cards left but did not provide a clarification as there was only one line of play for the rest of the tricks and the room was full of experts. Unfortunately our opponents were not experts and wanted to play on to check the validity of the claim. I know that play should have ceased when partner claimed but we were trying to help opponents understand why the claim was obvious and director was busy attempting to rectify problems with 2 boards that had identical hands. The trick was played round to my partner who made a clear error in not ruffing to win the trick and instead throwing a winner - he stated "I knew exactly what I was planning to do, but, in the confusion caused by opponents, etc. I simply pulled out the wrong card.". Too late - we called director. Director ruled that play ceased when partner made the claim and that partner did not provide a clarification statement. He also ruled that the law about played cards applied in the subsequent play and that this was evidence of an alternative line even though it was not an alternative natural line. We lost 12 IMPS on the board and although it did not make any difference to the result of the competition, I would still like to know whether this ruling was correct or not and which law was actually applicable in this case. Lesson learnt, my partner has promised not to be so careless in future and to always provide a clarification statement even when there is only one line.