Not so long ago, we went on a dedicated mission to find out exactly what happens to your iCloud account after you die. As morbid as the subject may sound, it is definitely something that most of us would like to at least know or be aware of.
And what we discovered a few months ago, was that Apple makes it essentially impossible for the family of a deceased person to get a hold of any data from their iCloud account. There was no outlined process for what the surviving relatives of the deceased should do, and even Apple employees themselves were largely kept in the dark in that regard.