Here is an option: self-investigate this and present that information to the Postal Inspector's Office, I would encourage you to do the following:
- Request from the offending post Office a copy of the written procedures that the postal employee is supposed to follow with this half-baked FedEx/USPS delivery process.
- When those procedures say that the employee does X, Y and Z before releasing the package, ask to see proof of that - in writing/signatures/video
- When they refuse to provide and/or provide the inevitable litany of excuses, go to the Postal Inspector
Why? The procedures, the signatures, the proof and the video are all available to the postal inspector and will provide evidence of what could be at the minimum stupidity and at worse an out right 'insider' theft.
The Postal Inspector's Office is supposed to pursue cases of waste, fraud and abuse of position. Looks to me like you have 1 or 2 of those, possibly (I said possibly - and that is based on what you have stated and my experience). Postal Inspector will find out what happened as they have that supreme authority - but you have to layout a solid case because what you experienced - if a fraud - is the tip of the iceberg. If the best case - just stupidity - then you have someone not following procedures. In either case, the USPS is on the hook for compensating you.
One other item - I can't recall if you mentioned this. If you paid by credit card, contact the credit card company. The bottom line is that you have not received your goods. End of discussion. None of the "well, FedEx delivered" or the shipper saying "we did our part". You have rights with a CREDIT CARD (not a debit card, but credit card) and can dispute this up to 60 days after the billing date. I would pursue this angle concurrently with any other approach you take.
It all may sound aggressive but the only one that is looking out for you is you. Do not get caught up in anything other than the facts. Do not accept verbal assurances from anyone. Take copious notes of conversations including names, dates and times. Keep in mind that all the parties involved basically hope someone else takes responsibility or that you just capitulate and go away.
Let us know how it goes. Contact me off line if you want to discuss more.