Pairs event. South and E-W.
W N E S
1NT (i)
Pass Pass Double Pass
2 Pass STOP! 3?
(i) 10…12 HCP
In principle I agree with Jim. This is a matter of what East's intention was at the moment when East reached for the bidding box, and the TD is more likely to make a correct decision when the matter is fresh in the mind of the participants than the Appeals Committee when the participants have all had time to discuss it and convince themselves what really happened.
My guess would be that the TD was right. But I could not be sure without hearing from the players and TD. The important thing was whether the TD asked the player what he intended when he reached for the bidding box.