What's the biggest loophole you've seen or heard of?

So some Italian artist sold a sculpture on an auction for 18,300 in 2021 but the sculpture is invisible, he clearly scammed tf out of someone but the document of certification was given to the buyer to assure that the sculpture is there, crazy ass loophole cause we know this man had to pull the most entitled artist persona to pull of getting that certification, I know that man was playing the getting angry card cause clearly art has no boundaries and if he sees art in nothing then it's art, what a masterpiece created by a genius, I'm about to start an invisible art business, I have been inspired by his art πŸ˜‚
Whats the biggest loophole youve seen or heard of?
What's the biggest loophole you've seen or heard of?
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