It arrives and is checked
The seal comes first: intact, and not tampered with. Then the fill level against the neck and the shoulder, the label, the capsule, the base of the bottle and the closure. If there is a tube or a box, that is checked too, because a damaged presentation box is part of what you are bidding on.
Anything we cannot stand behind never reaches you at all. It goes back to the seller instead of into the auction, which is a duller story than most people expect from a whisky auction and exactly the point.