All right, you can all see where this is going.
Today, I open the mailbox and discover that, yup, I've recieved a shiny tube labelled in a very familiar handwriting. I have a sneaking suspicion that if I opened it up, I would find a very familiar print, too.
I double checked four or five times. Yup, I labelled it correctly all right. To, From, basic prepositions, same as I learned in school.
Tomorrow I will put it in the mailbox with a nice note saying "Please deliver to the "TO" address, not the "FROM" address. We'll see if that works...