Decades ago there was a Quincy episode dealing with this (Quincy was a “medical examiner”...a doctor who works for the police to try to figure out why someone died). In that episode, they raised the question of whether a person was declared dead earlier than necessary, because he was carrying an organ donor card (i.e., it’s critical to harvest organs as soon as possible from a dying person, before they ‘spoil’). They concluded, no, he was allowed to die completely before they went after his organs. While that may have been the conclusion on that episode, I immediately terminated my organ-donor check box on my driver’s license.
These organ “donor” organizations harass families at the hospital so they can make big $$ off the organs from their loved ones. Nothing more than typical leftist culture of death.