How Banksy Authenticates His Work


When street artist Banksy first started selling screen prints online, they became a popular target for forgers looking to make a few bucks duping unsuspecting fans. It quickly got out of hand and must have been infuriating for both Banksy and his followers.

This is a companion discussion topic for the original entry at

Very cool!

But I’m compelled to remind people that this is how Banksy authenticates her work.

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The bill is like a split tally stick. Pretty cool to see a modern use of that.

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The other one I have seen about since posting is that the bill references a Chirograph. A bit more recent then the split tally stick, it was been super cool discovering stone aged information systems.