This Is Why You Can’t Photocopy Or Photoshop Money

You shouldn’t ever try to copy money.Also: You physically can’t do it. In a video from Wendover Productions explains that currency has a highly secretive, built-in system that alerts technology like photocopiers and Photoshop to stop working on it. Because counterfeiting is highly illegal, a photocopier will refuse to copy a bill, and Photoshop will reject the image.

The pattern depicted in blue dots is called the EURion Constellation, and was a security measure found in multiple international currencies. However, now there’s a new counterfeit-stopper on the block … and no one knows much about it.