I have twice forgotten to close the safe - with wallets, cash, jewelry, plane tickets, etc. inside. Once was at CSR and the other CBR. Both times, I returned to the room to find a note from management saying that mousekeeping contacted them once they found the safe to be open and that the safe was locked by management. Nothing was missing or disturbed either time. Now, I'm not saying to leave them unlocked because we probably just got a couple of honest mousekeeping people but I have never questioned whether they are safe.