I’m currently playing a postal chess tournament. Is there any way that you can reuse the move cards?
I don’t play postal chess, but I’d think the move cards would be considered an official document, in case there arised a situation in which the move order had be reconstructed, or reviewed by an official to make sure there are no discrepancies in the game.
You might want to check with the post office to confirm this but I think that once a card has a postmark on it, the post office would reject it.