SevenCubed - 3:31 pm on Sep 26, 2012 (gmt 0)
I guess the USPS is catching on. This ability was in place for most private carriers for at least 25 years via radio dispatched control.
It wasn't uncommon for a shipping clerk to come out to my truck in the morning during sort and load and ask to me to keep an eye open for package X and when found bring it to her so she can return it to sender (or delay it for a day or two). If I had already left the depot then it became the chore of the dispatcher to contact me via radio and inform me of the same, to not deliver it and return it to depot shipping clerk when I come off the road.
When I read the OP I was kind of surprised that there are still logistic companies that don't have this basic customer service option available.