There were a few timnes when the mousekeeper didn't take the tip. We'd leave it at the same place each time, on the night table between the beds, in the hands of a stuffed Mickey, with the bills open and clearly visable, as if Mickey was handing it out. It was only taken I think 3 times of our 7 night stay.
This makes me wonder if it's the same mousekeeper every time. Surely if it was, she'd know it was for her, if she took it the day before. I remember having a little card on the table in the room with the name of the mousekeeper, but maybe they switch.
I leave a dollar a person, since we're very neat, but maybe I need to find a better place to put it.