[mikestew]

There's nothing wrong with copying a $100 bill. It's when you try to exchange it for goods that have value that it becomes an issue.

[Merrill]

>Making photocopies of paper currency of the United States violates another section of the code, Title 18, Section 474 of the U.S. Code. Also forbidden under the statute: printed reproductions of checks, bonds, postage stamps, revenue stamps and securities of the United States and foreign governments. Those who violate this law can be fined up to $5,000 and/or be sentenced to 15 years imprisonment.

https://legalbeagle.com/7612138-illegal-copy-currency.html