It doesn't need that at all - just upgrade the USPS (and UPS and FedEx) "signed for" systems to also include a photograph of the recipient for high-value items, and the lat/long coordinates of the hand-off - that would immediately show when items were mis-delivered and as a bonus, get a photo for possible police investigations.
Or better yet: make it possible for those "shipping status" pages to show the full recipient address (e.g. by entering your own address first, maybe with a texting service using your USPS-registered phone number?)
Sometimes if I get a high value package from an unverified source I ask for signature confirmation, wait for the first attempted delivery and pick it up at the PO. I then record myself asking for the package and opening it in front of the postal official.
It's a pain and takes a bit longer but should something happen at least there is a bit of additional evidence.
But it's really just a crude workaround for an inherently trust based system. All that is ever tracked is the package which either the sender or receiver can easily manipulate.
Or better yet: make it possible for those "shipping status" pages to show the full recipient address (e.g. by entering your own address first, maybe with a texting service using your USPS-registered phone number?)