Funny Money

[mr bill]

Someone handed this off to me somewhere along the line

Not knowing that it was counterfeit [nor double layered] I handed it to a cashier at the Mega. I noticed that she was rubbing it in a corner but paid little attention. There was a long delay for "change". A supervisor then appeared and showed me the separating note.
I was quite surprised. She wanted it back. I saw the ink pad and large stamp she was about to hit it with. I refused. She said it was Mega's policy to stamp bad notes. I said it was my policy not to. It took several "No's" before she gave up and let me go. I said I would take it to the bank.

What would you do if you discovered you had Funny Money like this?

The 'weight' of the paper which seems quite durable is considerably less than that of a real 200 note.