Maybe, but also only if it’s trying to be used as cash. Trying to pay for groceries, meal, depositing it at a bank, etc. would be an issue. Leaving it as a tip, while a scummy thing to do, isn’t on the same ballpark since it’s not an agreed upon transaction (i.e. no price for a tip is agreed upon by the parties), and you’d have to prove intent to pass it off as cash and not just a flyer/pamphlet.