Don't stop there Phil move up the chain with the claim. It may not give you satisfaction but at least you get the chance to vent!
Make USPS give you a step by step reading of that package at each point it passed through! Time, date, and such! Tell them that you suspect that this was no accident and want to launch an internal investigation. They don't talk about it but they have such capabilities! If it is what I suspect you got a damn thief and he/she may lie right in your local PO.
I suspect that at least one branch someone saw the envelope knowing what was inside and moved the label. Labels are either self adhering or have been taped on,..........they don't just fall off and re-adhear them selves. There is someone always above who you have spoken too. Be sure to record all names of people you speak with and times. Government agencies do not like having someone looking into there business so they will try to make this a difficult process.
Go back to the company and talk to them about receiving a package with two shipping labels????????????????? That sounds like a BOS! No one there questioned this??????????? Tell them you want any and all details on who and how this claim was processed!
Me thinks you got a crook in the process somewhere and if you shake the tree hard enough the monkey may just fall out!
EDITED:
After looking at Stacy's post try his approach first! The old saying you can catch more flies with honey than vinegar. It just tends to whizz me off. We look at the PO as a government agency and we are taught to trust and believe in them!
The problem with those mailers is just like a Birthday card. The bright envelope is like a neon sign drawing a crook to snatch it. It hasn't been all that long ago that they caught a bunch at one of the major hubs putting mail on to planes and they were keeping all the birthday cards and stealing the money or gift cards from them. If you don't think that they know there is a potential for a problem, next time you are in a major PO lookup on the wall above the teller. There is a small window above each one. There is a catwalk that supervisors can spy on employees at any time. Although I suspect with video that is all being fazed out now!
If they do an investigation and what I suspect happened happened as too the label. Then someone had help. Because if both labels on that one package were scanned all the way through someone had to know to watch for the package and scan both labels meaning they were scanned within seconds of each other! Maybe I am being just distrusting here on this theory but I can't help it!!!!!!!
On a side note- Stacy is there anything that you haven't been evolved in?
NOTE to self: I need to meet Stacy one of these days!