Notelet
/ˈnəʊtlət/
Definition 1 of 1
Pro Tip 1/3Informal Use
Notelets are usually informal and used in casual or personal communication, not for official purposes. 
Jotted a notelet to remind myself to call Mom.
Pro Tip 2/3Physical Object
A notelet often refers to a physical piece of paper, rather than a digital message. 
I found an old notelet from my friend tucked into a book.
Pro Tip 3/3Short Message
Notelets are intended for brief notes, rather than lengthy letters or detailed explanations. 
Passed a notelet in class to invite Sarah to the party.