This cover enclosing a Christmas card was mailed on December 17, 2013 to a PO box in The Dalles, OR 97058.
On Christmas morning it received a Nixie machine label, “Not deliverable as addressed”.
This cover was returned to me and arrived on December 27.
I assumed that the last name circled is not registered for that post box at the The Dalles post office, and that was the reason for its return. I was correct. The addressees have since informed me that they closed their PO box at least two years ago.
Why did it take over a week before the Nixie was applied? I don't know. Any links to the explanation of Nixie markings appreciated.
I ended up hand-delivering this card on January 14 2014.