Real life already has a service for this. They are called lawyers. They can keep your records on file, you know who they are, they have legal responsibility to keep everything confidential, and when you die... things just work.

I guess this would work for more casual documents, passwords to facebook, whatever. I have a document printed out and kept in our file cabinet for such things, so I would not use this service, but I can see where other people might.

Good one. Although not available for me using custom domain : getting "Inactive Account Manager is not available for your account. We are sorry, Inactive Account Manager is not available for your account."