I had a friend tell me that a client tried to pay her with a fake $100 bill. She said it had motion picture money written right on it. She said guy seemed upset and told her he would go to an ATM and be right back but never showed. I thought it was a joke but found this: http://www.newschannel10.com/story/3...nterfeit-bills.
So they are quite easy to spot, but be sure and check the bills, especially if the donation is in an envelope.