Bismillah
as salam alykom Princess
Insh aAllah I will look for u, however, as far as I remember I read a fatwa by the renowned late Egyptian Sheikh Sharaw that donating what u dont own (which is your body) after your death is not permissible.
Well I will look more since this issue is somehow controversial, as there are organs that u cannt donate which are life determinants such as heart and others that u may. Also there is the donation during life and making a will to do so after death.
Curious, as we explained many times, Islam is a way of life that regulates every aspect in this system. It regulates even where to eat and who to visit and when.
We as Muslims strive to follow this Divine system, thus, we always need to ensure we are doing what is halal and avoiding what is haram. There are things that are new to the world such as organ transplantation for ex, we need to ensure that Islamic ruling on it before following or not following. While in some cases, Muslims do need knowledge. Not every Muslim is a scholar. What is even more important is that gaining knowledge is highly recommended in Islam. We should never stop trying to gain and learn more and more.
Who decides, Quran and Sunnah, in cases of new issues such as this one, well versed scholars carry out the responsibility of searching and formulating an opinion. IN case we receive different opinions, even in this case (sunnah= sayings and traditions of the Messenger prayer and peace be upon him) teaches us to follow what is easier to us.
Princess hold on I m not out of here Insh aAllah will provide an answer :)