If all the numbers say it's a 50 dollar note and it feels like a 50 dollar Note... it still might not be a 50 dollar note. This counterfeit $US50 is actually hiding its true self: a 10 dollar bill. And it's doing a good job too! Since it's likely that most people's over trusting eyes would just see the 50 and assume it's a 50, people wouldn't even bother to realise that its Alexander Hamilton on the note and not Ulysses S. Grant.
But oh the tricks counterfeiters use. See how the 50 gets rubbed off in the video below.