Day 7:

This $20.00 Federal Reserve Note is yet another example of something going horribly, horribly wrong at the Bureau of Engraving and Printing. This particular error, called "
Seal Shift,"is similar to the "Seal Drop" described above and occurs when the the currency sheet moves during third printing when multiple elements are supposed to printed simultaneously (but are actually applied by different machines), causing some of the elements (in this case both seals and the district numbers) to be shifted down.
[Again, the back of this note looks like a perfectly ordinary $20 bill, which is why I didn't include a picture of it.]
----------------------------------------------------------------------- That's for Error Note week! And now, for a special bonus, my complete (such as it is) collection of notes with fancy serial numbers:

[This type of serial number is, I believe, referred to as a "Near Solid". If only that one 8 were a 5 instead...]

[This type of serial number is, I believe, referred to as a "Binary."]

[This type of serial number is, I believe, referred to as a "true binary super repeater."]

[This type of serial number is, I believe, referred to as a "binary repeater" or "super repeater."]