Passing Notes

I never passed notes in middle school. Perhaps I wasn't cool enough or didn't have enough literate friends. But the past few days I've been passing notes with my UPS guy, and I've discovered that I never missed out on anything in middle school. I leave a note asking him to leave my package at my door, and he sticks another note on top of it saying that he'll come back the next day. Three days in a row. Now I'm wondering if he's literate.