Lazy 3s (and other numerals) are notes exhibiting the denomination in a horizontal position. These follow the name originally applied to $2 first charter national bank notes, better known as Lazy 2s.
I never claimed to be a writer, and I still don’t even though and I co-wrote with John Schwartz the “Standard Guide to Small Size U.S. Currency, 1928 to Date”. My writing ‘education’ consists of one course in “Free Writing” taught by Professor Nelson at the illustrious Minot State University, where I earned a four year business degree after dropping out of the geology program because my brain was impermeable to higher math. Prof.
Banker Scrip was a type of scrip issued by merchants but guaranteed by a local banking house. They were presumably backed by deposits of the merchant who issued them.
Postal Notes were a medium offered by the U.S. Postal service for the purpose of sending money through the mail. There were issued in amounts from 1c to $4.99. There were five main types of Postal Notes issued from 1883 to 1894.