$1 1988 FRN = MAJOR GUTTER FOLD ERROR with PRINTED FOLD = Multiple Error Butterfly XF

Woah! This multiple error made our jaws drop!

Let's start with the giant gutter fold error that's impossible to miss. This monster has affected each of the three printing processes leaving a giant white void on both the back as well as the face. The serial numbers look like they're jumping from a pop-out book. There's some scattered gentle handling, but who cares when your note looks like this!?! ...ready for the story to get better? 

It's actually a DOUBLE ERROR with a minor printed fold evident from the back near the top of the gutter fold where two black thin parallel lines are seen. These lines belong on the face printing...not on the back margin.