If a user moves/renames/removes files, the URLs shouldn't simply be dead links now. Please record information so that impacted users know When the file was moved/removed, and WHO did the action.
I recently had Box Notes and Folders get moved or removed. And while I know who SHOULD have been the owner of the content, anyone else having problems finding the content wouldn't know who to contact.
So if a box link was previously valid, and that content has moved or removed, leaving some breadcrumb for the user, about who to contact, when the content was moved/removed, etc, can help users to find the content again.

UPDATE: The owner moved the content, and changed the access list. So in the end, the URL Was still correct, but my access had been removed. Either way, other people having an access issue wouldn't have known who to contact.