Any postal workers on the board? Got a question or two...

I asked a friend that I worked with. He asked a carrier....his response.....
Ok, if they're too big for the boxes at an MBU, multibox unit, then we may leave them at the door, if we feel it's secure enuff. On some pkgs, all of amazon for example, it will say CARRIER, LEAVE IF NO RESPONSE. Meaning, we have permission to leave the box at the door of the home. If that's not on the pkg, then we're not supposed to. We CAN, if we feel it's not gonna be swiped. It's kinda up to us. Other reasons would be, the shipper requires a sig, but that doesn't sound like this. If they've had a rash of theft in the immediate area, they may tell the carriers not to leave at the door.
And the second part...
Tell him to look up the tracking if he can and see what the reason is for not leaving it. We have to input a reason before it let's us finish the scan
Sadly it does sound like the carrier is the problem.