Bit surprised this thread has gone on so long.
If someone dies, in a low berth or wherever, their goods go to their beneficiaries as defined by will or by law or custom. Otherwise to the government.
Freight service is starport to starport, unless other arrangements are arrived at (for which a premium is payable). Whilst in starports/space the goods are covered by Imperial law, once landed they will probably face some kind of customs inspection, and will them fall under local juisdiction. A free trader approaching a high tech star port will transimit its cargo, and the addresses that the containers will be delivered to, so local firms can collect and complete the cargo movement, or the consignee can collect themselves. On approach to a low tech port there is still likely to be some kind of traffic control, though cargo handling will not be so slick, the containers might end up being unloaded and warehoused, but that is not the problem of the carriers, who have done their part and get paid.
Though I like the idea of a free trader making a door to door delivery, its not very likely for most cargos (but, like every other GM, I know that it is the very special cargos that create the stories, and get the big payouts!)
Egil