A costume is fabric with an attribution. Without proof it is a dress. In the overview Security for collectors you store it like Couture: dark, breathing, flat if it is heavy, with a moth check.

The attribution

"Worn by" goes on the list only if a proof says so. Otherwise you write what you see: cut, label, condition. Invented closeness to a person is not a price an insurance policy replaces.

If someone comes

Bulky. The damage is often light and moths, not the night. The one documented piece does not hang by the door. The papers sit in the document cabinet.