President Obama's nominee for treasury secretary, Jack Lew, is a budget expert who's worked at Citigroup and led the Office of Management and Budget, a liberal-minded wonk admired by some in the GOP.

He also has a crazy signature, as seen on this 2011 OMB memo: 

Which means for the next few years, our money could be graced with a weird loop-de-loop. Or not. 

The signature of the treasury secretary goes on every bill printed during his tenure. (The switch takes a few months.) Current Treasury Secretary Timothy Geithner came into office with a signature that was fairly abstract. But on currency, he managed to make his name legible, if less elegant.

What happened? NPR's Marketplace explained in an interview last year: 

Kai Ryssdal: I gotta ask you about your handwriting. Is it true that this used to be your signature  and you changed it into that  chicken scratch? [...]

Geithner: Well, I think on the dollar bill I had to write something where people could read my name. That’s the rationale.

And Geithner explained why his script is not the best: "Well, I took handwriting in the third grade in New Delhi, India, so I probably did not get the best instruction on handwriting." 

Where Lew learned to write in scribble-code, nobody knows.