Earlier quoted context omitted.
But there is no such thing as a “genuine” $30 bill.
If it's being passed off as money, then someone thought it was. I don't think the Secret Service cares if it's an invalid denomination or has Bozo the Clown on the front. Probably not a high priority for them given the overall lack of believability, but the attempt is what counts.
It's still fraud, and an attempt to deceive.