I am a currency collector, world paper banknotes is what I collect the most.

I was buying a 20 Pound note from England that is/was no longer printed. It looked good in the pictures as well as was described as "UNC" or un-circulated, which to a collector means it has no folds, tears, pinholes, etc. "UNC" is a very common description of notes in the collector world.

I get the note, and it looks like somebody had thrown it in the washing machine. Contacting the seller why it was not an "UNC" note, they replied, yes its un-circulated because it is no longer in circulation.....