Here's the conversation that happened last night:
Hannah: Did you check the mail?
Tony: yeah. Just the cable bill. oh, and I finally mailed back the Netflix movie. I can't believe we've had it for so long.
Hannah: Wait, what movie?
Tony: The one one top of the tv.
Hannah: yeah, that's the new one. I don't even think we opened it yet.
Tony: what? crap.
His solution? "I'll just put a note in the out-going mail and ask them to give it back. A big note, so they can't miss it."
and so he went upstairs. and was gone for a long time, but I figured he just started working on something else.
Then he returned, with this:
His response to my half laughing, half confused expression: "I thought if it looked like it was from a little kid then they'd give it back..."
We shall see...
Edit: It worked. The mail person gave back the movie AND the note.