Just do it keep your mouth shut. The Elders have been given a letter from the Society that tells them they can not investigate any brother or sister for the misuse of blood. So this really means a don't and we want investigate.
They have been told even if a sister or a brother saw you having a transfusion they can not do anything about it unless out over your mouth of tell someone that mean they can not ask you about it even if they are told by an eye witness.
So do what you fell is correct.
I have a letter I call my blood letter that uses only the bible that completely will remove any doubt in your mind over blood I have had 3 CO's and 8 Elders go over the information with me and everyone has said I am correct. One Elder quit the BORg because of the letter, one stepped down, and another put his head between his legs and cried. If anyone wants a copy PM me and I will send you the information.