Steve Wozniak of Apple fame used to get sheets of $2 bills turned into pads with perforations so he could tear off the bills to use for transactions (or just spend a whole uncut sheet). Fun gag.

https://www.reddit.com/r/explainlikeimfive/comments/3akq2q/e...

https://catalog.usmint.gov/paper-currency/uncut-currency/