Del. Code tit. 28, § 1554

If a defective deck is used, all chips in the pot must be returned to the players in the amount each contributed. Players who know the deck was defective and attempt to win the pot by a bet are not entitled to their chips in the pot. Such chips must remain in the pot as forfeited for the next game. A player who won a pot is entitled to keep it, even though the deck is subsequently found to be defective. No sponsoring organization or licensed third-party or charitable gaming vendor shall use a deck which it knows or reasonably should have known to be defective. The cards in the deck shall be counted within 30 minutes of play, at a minimum.