If you want your actor to fan through a few piles in a scene; just copy a real $100 with a piece of paper across the middle, so there is a white stripe across the bill to make it kosher with the Feds. Do this to the copies, front and back. Make a bunch of the ersatz Benjies to fill up the stack; then put the real Hunney on top to sell the wad as real. The actor can flip through the pile in a close-up. The rest of the stacks in the case or box can be chopped up newspapers with one of the copies on top with the $100 wrapper covering the white center stripe.
I know someone who tried this method for exactly this prop to put on display, but found he was unable to print them, even with a band missing, this is due to most modern (Last 10 years) printer firmware being written to recognise the patterns (Special algorithms) and unique colours of banknotes and your machine will most likely refuse to print unless they are oversize by 3/1 or thereabouts. It will probably stop just after printing 3-4 lines and will refer you to 'rules for use.org' where they will tell you not to be naughty and what rules to follow.:angel
I was told that there is some sort of code imprinted on the new bills that they cannot even be photocopied. One person told me that there was a pattern in the stars on the face, but that turned out to be wrong. I just took old bills from 15-20 years ago, scanned them in my computer, and modified them, making sure that they said "not legal tender" on both sides, and on the back I put "for motion picture use only" along the bottom.
I just copied a five and ten that had this "EURion Constellation" with 3 different copiers of 3 different manufacturers on "Best Photo" or their equivalent, copied just fine.
It's a neat feature that i didn't know about. Too bad it didn't work, I wanted to see that error message!