They implement a physical Tor each time their check their box - layers of Taskrabbits hiring Taskrabbits. One picks up the Mail and hands it off to the next. The owner is one of the Taskrabbits somewhere in the chain.
Back in 2006, I became involved in a USPS investigation (witness/victim); barring specifics, the perpetrator's PO Box [0] was involved: the investigated would send minors in to retrieve packages, which is allowed ("possessor of key possesses mailbox privileges").
This made it extremely difficult to capture the actual perp. He eventually walked away with minimal consequence, for lack of evidence/possession.
ProllyInfamous|18 days ago
This made it extremely difficult to capture the actual perp. He eventually walked away with minimal consequence, for lack of evidence/possession.
[0] established with false identification