A truck arrives at a loading dock. A driver hands over a pickup number. Someone at the gate writes down a name and a plate, the trailer is loaded, and the truck drives off. It takes twenty minutes and nobody thinks about it again — until a load never arrives, and a carrier nobody hired turns out to have collected it.
That is double brokerage, and the reason it works is structural. The shipper's customer hires a broker, the broker assigns a carrier, that carrier quietly re-sells the load, and a different truck shows up at the dock. Every party has a record. None of them is the same record, and the only person physically present is the driver, who is often the last to know they are part of a scheme.
The facility could not verify what it could not see. Whether the driver held the licence they presented, whether the truck belonged to the carrier on the paperwork, whether that carrier was the one actually assigned — those were questions for an investigation afterwards, not a gate at nine in the morning. And the company whose freight it really was, the consignee, found out last of all.
The actual problem
A pickup is a claim made by whoever is standing at the gate. It becomes a fact only when someone else can check it.