another good question. donors should really have a discussion well in advance with loved ones about their wishes as well. if a family member is faced with the decision to donate at the onset of shock of loss, and without the discussion taking place prior, the decision to donate will be extremely difficult to make and the donation may not take place. The decision to donate has to be made very, very quickly.
If the discussion has already taken place, the seeds will have already been planted; the memory of the decision/wishes should come forward quickly to the family member (in shock and left with the responsibility to decide), thereby allowing the family member to make a quick decision in favour of donation.
The deceased may have left a written wish to donate, however that information may not be readily available at the time of death. Thus, the decision is left up to the family member who is in shock.
I'm speaking from experience. hope the above makes sense....