Over the weekend, this occured in a team game at a Sesctional Tournament. The bidding was approximately the above. (West might have been dealer and passed, and South might have bid 1♠ instead of 1♥).
While East was contimplating his lead. West asked to look at my convention card. I allowed it and he asked whether my 1C was a short club. (The card is clearly marked 3+ promised.)
I was intent on calling the director if a club were now led, but I got some other lead. I took 10 tricks in the other 3 suits before I finally had to lead a club, and West took the final 3 tricks.
After the hand was done, East said to his partner, "Sorry, I did not have a club to lead." I am not going to call this pair cheats, as that is not proper, but it seemed to me that the question was deliberate UI, and that it was likely this pair has done this sort of thing before and likely gotten away with it.
Since there was no damage on this occassion, I never called the director, but wondered later if I should have so that this pair would at least be informed of their ethical responsibilies, if not issued a PP or haveing a recorder report taken.
Would this have been the best thing for me to do?