Facebook has tools designed so you can designate someone to manager your account after your passing. This has very limited options, but it does mean that they can manage your memorial page after you pass. They will not have the ability to do everything that you could do, and they will not be able to go through old messages, that you have with other people.

Follow the link to see how to set up your legacy person today. This is part of estate planning.

https://www.facebook.com/help/1568013990080948?ref=shareable