Exactly. Two cards would facilitate fraud. I'm not sure if there is a specific ban upon it or it is merely considered an ethical violation that would get the registrar in trouble if they print out a duplicate card without an affidavit of a lost or destroyed card or something like that.It is my understanding that duplicate player cards are not allowed or severely frowned upon. Why? If a player commits Assault or Referee Abuse, or the card is suspected to be falsified, then the card is to be held by the Referee and surrendered to the league or Cal South. Having a duplicate set of cards in the wild breaks the system.
The real solution is electronic cards and we're not far away from that.