A donor card is a document that records your wish to donate your organs and tissues after you die. It serves as a written authorization, signaling to medical professionals and your family that you’ve made the decision to give your organs to people who need transplants. While physical cards still exist, the modern equivalent is registering in your state’s online donor registry, which creates a legally binding record that hospitals can verify electronically.
How a Donor Card Works Legally
Under U.S. law, organ donation is treated as a gift rather than a medical procedure. The Uniform Anatomical Gift Act, which governs donation across the country, requires three elements: the intent to give, the transfer itself, and acceptance by the recipient. When you sign a donor card or register as a donor, you’re completing the first element by documenting your intent. This is called “first-person authorization,” meaning you personally authorized the gift before your death.
That authorization carries real legal weight. The law states that an anatomical gift not revoked by the donor before death “is irrevocable and does not require the consent or concurrence of any person after the donor’s death.” In practical terms, this means your family cannot legally override your decision if you’ve registered. This is a point many people misunderstand. If you are over 18 and signed up in your state registry, your permission stands regardless of what relatives prefer.
For people under 18, the rules are different. A parent or legal guardian must give permission for donation.
Physical Cards vs. State Registries
The traditional donor card is a small card you carry in your wallet, often included with your driver’s license. But a physical card alone has significant limitations. You may not have it on you when it matters, or it could be overlooked in an emergency. The federal government’s organ donation program is direct about this: “Signing a card isn’t enough.”
State donor registries solve this problem. When you register online or at your local motor vehicle department, your decision is stored in a searchable database. Hospitals check this registry when a patient is near death, and the electronic record is far more reliable than a card that might be buried in a wallet or left at home. As of 2022, roughly 170 million people in the U.S. have registered as donors through these systems.
You can sign up online through your state’s registry at RegisterMe.org or through organdonor.gov, which links to each state’s individual program. Many people also register when renewing their driver’s license, which is why the heart symbol or “DONOR” designation on a license has become the most recognizable form of donor card in everyday life.
What You Can Specify
When you register, the default option typically authorizes donation of all eligible organs and tissues for transplant. But you’re not locked into an all-or-nothing choice. Most registries allow you to update your preferences at any time, specifying which organs or tissues you’re willing to donate and which you are not. If you only want to donate your kidneys but not your heart, for example, you can set that preference. You can also remove your registration entirely if you change your mind.
What Happens in an Emergency
A common concern is whether carrying a donor card or being registered affects the medical care you receive. It does not. Saving your life is always the first priority. Emergency medical protocols make this explicit: treatment and transport of the patient remain the highest priority, and any search for donor documentation must not interfere with patient care.
If a patient is unconscious and death appears imminent, emergency personnel may conduct a brief, reasonable search of the patient’s belongings to check for a donor card or other indication of donor status. If they find one, they notify the receiving hospital and transport the document along with the patient. But this step only happens alongside care, never instead of it. The hospital’s transplant team and the doctors treating you are entirely separate. Organ procurement professionals are not contacted until all life-saving efforts have been exhausted and death has been declared.
The Gap Between Support and Registration
Despite broad public support for organ donation, there’s a notable gap between intention and action. Surveys show that about 90% of American adults support organ donation, but only around 60% have actually signed up. That 30-point gap means tens of millions of people who would want to donate have never formalized the decision. Without registration, the choice falls to family members during one of the most stressful moments of their lives, which can lead to delays, disagreements, or refusals that don’t reflect what the person would have wanted.
Registering takes only a few minutes and removes that burden from your family. It also ensures your wishes are legally protected in a way that a conversation alone cannot guarantee. Telling your relatives you want to be a donor is valuable, but it doesn’t carry the same legal standing as a registry entry. The combination of both, a formal registration plus a conversation with your family, is the most reliable way to make sure your decision is honored.