I thought the USPS was using contractors to sometimes deliver mail ?
At least here, the regular carriers aren't getting signatures on "signature required" packages anymore.
A few weeks ago, I had a few packages arrive on the same day. One was an express mail package with some fairly valuable contents(insured $1K) and the other were my wife's and my passports, arriving surprisingly early.
In any case, imagine my surprise when I got a knock at the door late in the afternoon, and the postmaster was standing there with her personal vehicle parked in front of the house. She hand-delivered the 3 packages to me and got a signature on them...