A Question of Trust
Having dragged all of our newly-found loot out of the dungeon and back to town we sell what we don't want and divide the cash evenly amongst ourselves. We are then left with the arduous task of spending it. One of the items we thought about selling, to increase our cash considerably, was the Ring of Three Limited Wishes. Trying to find out how much it is worth, we ask who was looking after it, and no one can remember. The Rogue says that he doesn't even remember us picking up the ring.
Uh-oh. I think we can work out who has the ring now, even if we can't prove anything.
It's a sad state of affairs when a party decides that the Rogue is a more responsible person to look after a valuable item than the Paladin.