There are plenty of checklists for emergency supplies, and then somewhere there is the statement "important legal documents."
See this list, which is pretty all inclusive and the best one I've seen personally,
Important Legal Documents for Emergency Preparedness.
I maintain a bank safety deposit box and I see a few items that I need to add to its contents.
Eric Holdeman is a contributing writer for Emergency Management magazine and is the former director of the King County, Wash., Office of Emergency Management.