Notes of Advice From Einstein Written in Lieu of Tip Fetch $1.8 Million at Auction 

Once, while he was traveling, Albert Einstein either found himself without any cash to tip a delivery man, or the messenger refused to accept. So he scribbled a couple of notes of advice, and they’ve just sold at auction for over a million dollars total. Today, of course, he’d get dragged for three days on Twitter before issuing an apology via Notes. Source: Notes of Advice From Einstein Written in Lieu of Tip Fetch $1.8 Million at Auction