We are on guard at the hotel for this latest scam.
The scammers (usually a couple) will be dressed nicely and will act like they are guests of the hotel. They will cruise around the hotel floors until they locate a housekeeper cleaning an occupied suite. Then they will walk right into the room, and say something like "Oh, hello. Don't mind me. You can keep working. I just needed to swing in and grab my laptop," or "If you would please excuse me, I need a few minutes of privacy here, please." They speak with such authority and seem so confident that it can trick the maid into assuming that this is the guest who is staying in the room, and they immediately comply with whatever they are asked. The end result is that a thief can brazenly walk out with a bag, electronics, and personal items, all within a matter of minutes, and the maid won't raise any alarm. The theft isn't discovered until later, when the real guests get back to their room.
We've alerted everyone on staff about this ruse. Housekeeping is now trained that if a guest returns to the room while the maid is servicing it, she needs to ask the guest to present their valid key card to the door before she can allow them into the room. Most of our guests really appreciate being asked to to verify themselves, actually. They are glad to know that the maid won't let just anyone come into their room while they are away.