I received a book today that had been mailed in an envelope with the PBS mailing label attached somehow. I can't tell exactly, because all that's left of it the tail end of the first line of my address (the end of my name), "rsons" and the tail end of the third line, which is the nine-digit zip code. That scrap of label was taped to the package and it was delivered to me today.

A very nice book, too. I'm glad it made it. ;-)

Lol y2, lately I've only been using my street address and zip code for return address.  As you've discovered, not all that information is necessary for delivery!