Helibore: I doubt that is the case. After all, if you make a mistake, and the stones are quickly removed the situation is the same. Furthermore, in any serious competition, players must write down their moves anyway.

No, the reason is that you are not allowed to jump a stone twice. If you make a multiple capture using a queen, if you would remove the stones during the move, it may be that it appears the queen has a free path, instead of being blocked by an already taken stone.

While speaking on this subject, shortly after International and other national checker variants appeared, I asked Fencer to make it on the move confirmation visible which checkers had been taken in this move (for instance, by showing them with a blue border). He answered positively, but it still hasn't happened. :(