[Abathar]

$10k fine if you get caught doing it. I guess pennies and nickles both are getting to the point of making it profitable to do it again.

[Atlas Sneezed]

$10k fine if you get caught doing it. (Melting down pennies)

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I don't believe that. It is criminal to modify money for purposes of fraud (increasing the denomination or cheating vending machines), but your money is your own to do as you please.