Money

Although this notesays that it is legal tender, you can see by the flipside that it is actually a business card.
It is made of paper like a note.
It belonged to The Duke Of Hamilton. I had him as a passenger in my taxi about 23 years ago. Apparently it is the oldest Dukedom.
I know his address is on it, but he died years ago, so it makes no difference.
He was a bit of a drunk, but was fine as a passenger.