Is leaving the donor registry enough?
No, revocation is not a refusal.
No. Your organs can still be donated.
Taking your name off the donor registry, or the donor mark off your license, only removes a yes. It does not record a no. Under the anatomical gift act, a revocation is not a refusal and does not bar another person from making an anatomical gift. Family or hospital staff may still authorize a gift unless they have actual notice of a signed refusal.
Search pages and chatbots often say opting out is enough. They are describing a revocation as if it were a refusal.
What does enough look like?
A refusal you have signed, that can be found when it matters. That is what WearableDocs hosts: your executed instrument on a page reachable from a code you carry.
This is not legal advice. For the statute in your state, see your state’s page and the product FAQ.