[randywaterhouse]

Interesting bit on the authorities viewing him as a counterfeiter. I'd guess that if parties are willing, and none are misrepresenting the note as currency, it's alright and a transaction of goods/services in exchange for art. His Wikipedia article [1] profiles a few cases where he ended up arrested - interesting. I suppose in some cases, like the waitress example in the article - the waitstaff may not be able to legally accept the fake note on behalf of the establishment (so hopefully the waitstaff would put one of their own $10 in the register...)

Further, I suppose, there's an argument for counterfeiting of bills being legally interpreted simply as their production even without the misrepresentation bit. This'll lead me on a merry chase, I'm sure.

[1] https://en.wikipedia.org/wiki/J._S._G._Boggs

[theoh]

I think there's a crucial legal notion of "uttering" forgeries as currency, but other stricter laws do exist to protect currencies against illegal replication. AFAIK.