i have sold an auction but no info on the buyer is visible,( just their email ) does anyone know why this happens?

Some delivery companies prohibit perfume ( amongst many other items )  being entered into their system. I know that there are many parcels with perfume/s that go through and dont get picked up, but I wonder who is liable in the event that a package is stopped along the way. The seller or the buyer?  The buyer is definitely the one with the cash loss at this point, but the seller has created the problem. What are the ways to handle this? I currently am in the position of having a reserve met bid on several bottles of perfume that the seller will be sending through a delivery company that pro...