All the coins that are in the Reserve stay there until a player claims that they are not the Duke and takes them. This action is unblockable but it can be challenged. If a player is challenged on this, the player must show both of their influence cards. If either of them is a Duke, the person taking the money must return the coins and lose an influence. If they are not the Duke, they get to keep the coins, draw two new influence cards, and the challenger loses one of their influence cards.