This would clearly work for tiny packages. And imagine bypassing all the traffic.
Your small package has arrived and was delivered to your PO box.
You know that nothing turns me on more than a large pepperoni pizza!
And there goes the MacBook I just ordered for my birthday.
I would go one step further and just not place any dollar bill at all. Makes perfect sense together with the note, ensures the package goes on the back door and saves me a dollar. Evil but genius.
Just place it under the rug so nobody will see it until I get home.
I'll just drop by your house tomorrow at the same time to make sure you don't get your package.