I had 15 books in a children's series requested from me to one member. As I always do when I'm sending that many books, I did Instant Credit and PBS Tracking to ensure I got the credits and that the books safely reached their destination. Today, they seem to have arrived at the proper place, in Loveland, OH. But now the tracking is starting to say 'Unknown'.

OF means Out for Delivery.

Really? I've only seen it that it actually says, spelled out, 'Out for Delivery'.

PC = Processing Completed

OF = Out for Delivery

If you look at them on USPS (which you can only do if you used DC only or if you used PBS Postage with first class mail), then you'll see them spelled out. The next scan you see should be Delivered, and PBS does spell that one out.

And "arrival at Unit" means it's arrived at the nearest postal processing center.

Ah, okay. That's so weird. Like I said, I only get the PBS tracking when it's a large order (so this is only my third one) and I've only ever seen it spelled out completely before. But thanks for the info, guys!