France has moved to make every person in the country a potential organ donor. It joins a list of over twenty-five countries who already have 'opt out' laws—that means that once a person dies, it's presumed that they consent to donate their organs unless they've specifically signed up to an opt-out register.
In Australia, we have to opt in to donate organs and tissue.
If you haven't expressed a preference either way, doctors ask family members to make a decision. In about one-third of cases they refuse.