Did you sell the copy to the person who passed it off as an original? If so, you might be in real trouble, especially if it forms a pattern of behavior. If it w

Did you sell the copy to the person who passed it off as an original? If so, you might be in real trouble, especially if it forms a pattern of behavior. If it was a gift and no form of remuneration was expected or received you’re going to be fine. The more nuanced answer is “prosecutorial discretion” because this will be investigated. If you’re an art student who did this once, for $100, you’re probably just going to be told to stop being so naive, not held criminally liable.