Interestingly enough, lots of consumer printing software will not print images of US currency. Photoshop will absolutely not allow you to even open images of it.
Agreed, this is caught by photoshop. I tested with http://mrnussbaum.com/prescurr1/1.jpg . Apparently wasn't accurate enough for photoshop to complain.
He's right, you are wrong. Modern color printers sold to consumers run image recognition on the images they print and refuse to print ones that contain features found in real money. Try it if you don't believe me.
They also add watermarks -- small almost imperceptible yellow dots that uniquely identify the printer in question.
http://pbx.mine.nu/random/Series2004NoteFront.jpg
You are absolutely right. Newer banknotes are unable to be opened in Photoshop.
I feel dirty.