Same handshake here. Broker and carrier file the same number, dispatch confirms the match before the truck rolls. Never the driver.
Dispatch is one gate late. The goods half hangs on a declaration reference that does not exist until the declarant has filed, so we hold the release until that number is on the papers. Loaded without it, the truck is already wrong.
Your gates both need someone holding the goods. My loads leave a shipper's yard: nothing there to hold, and dispatch waits on a reference sitting with a forwarder abroad. Truck rolls. We learn at the barrier.