You won't win.  When you mail something you're putting it in a mailbox or handing it to an employee.  That's all their property.  You can't even destroy a mailbox you bought and you can't use anything as your own mailbox.    With that said, I've read too many times about mailbags found in landfills or garages.  I think long island found dozens of mailbags in a mailmans shed.    All this 'hidden' tech and USPS still has the shittiest tracking system.  That should be a lawsuit.  Losing mail you have the capabilities of knowing were lost and where (taking pictures at every handoff means you know the mailman or truck driver didn't do their jobs).  That's theft.  Taking a picture isn't illegal because it's information you're authorizing them to know otherwise you wouldn't give them your mail anyways.