An Advance Medical Directive is a legal document, made under the Advance Medical Directive Act, in which you state in advance that you do not want extraordinary life-sustaining treatment to be used to prolong your life if you become terminally ill and are unconscious or otherwise incapable of expressing your wishes. It is narrow by design. It appoints nobody, it says nothing about your money, and it does nothing at all unless that specific situation arises.
Most of the confusion around AMDs comes from mixing them up with a Lasting Power of Attorney. They are different documents doing different jobs, and the difference is the point of this article. An AMD is your own instruction about one medical scenario. An LPA hands decision-making authority to people you choose, across a much wider field.
What an AMD actually covers
The directive operates only where two things are true at the same time: you are terminally ill, and you are unconscious or otherwise unable to communicate your wishes. If you are conscious and able to speak for yourself, the AMD is irrelevant: your contemporaneous decision governs, as it always would.
What it declines is extraordinary life-sustaining treatment: intervention that serves only to prolong the process of dying without any prospect of recovery. What it does not touch is ordinary care. Palliative care, pain relief, nursing, hydration and comfort measures are not what an AMD is about, and a person with an AMD in force is not abandoned. The medical team continues to care for you; what changes is that they do not deploy machinery to extend an ending that is already underway.
That distinction is worth stating plainly to family members, because the fear an AMD provokes is almost always the fear that it means giving up on someone. It does not.
What it does not do
- It does not authorise anything to be done to end your life. The Act is about withholding extraordinary intervention, not about causing death.
- It does not appoint a decision-maker. Nobody gains authority to speak for you because you made an AMD.
- It does not apply to ordinary illness, to dementia on its own, or to any situation where you can still express your wishes.
- It has nothing to do with your assets, your property or your money.
How an AMD is made
You must be 21 or older and of sound mind. The directive is signed in the presence of two witnesses, one of whom must be a medical practitioner. The doctor’s involvement is not a formality: part of the role is to satisfy themselves that you understand the nature and implications of what you are signing and that you are doing so voluntarily, without pressure from anyone.
The completed directive is then lodged with the Registry of Advance Medical Directives, which maintains the record. Registration matters: a directive that exists only in a drawer at home cannot be relied on by a treating team at the moment it becomes relevant.
Procedural details, including the current forms, where to submit them and the fees if any, are set by the Ministry of Health and change over time. Check the current requirements with MOH or ask your doctor rather than relying on a form downloaded from a general website.
Confidentiality and the ban on compulsion
An AMD is strictly confidential. It is an offence to disclose information about whether a person has made or revoked one, except in the limited circumstances the Act permits. That is a deliberately strong protection.
Equally important, no one may require you to make an AMD as a condition of anything: not insurance, not employment, not admission to a hospital, nursing home or any other facility. If anyone suggests otherwise, they are wrong, and the Act treats that kind of pressure seriously. Nor should anyone be told you have made one as a way of influencing how you are treated.
Revoking an AMD
You can revoke an AMD at any time while you have the capacity to do so. There is no waiting period and no requirement to justify the change of mind. What matters is that the revocation is recorded so that the registry position matches your intention, because a change of heart that nobody knows about achieves nothing.
Follow the current revocation procedure published by the Ministry of Health. If you have told family members you made one, tell them if you revoke it too.
AMD versus LPA versus deputyship
These three sit in the same broad area, what happens when you cannot decide for yourself, and they are constantly confused. The differences are structural.
| Advance Medical Directive | Lasting Power of Attorney | Deputyship | |
|---|---|---|---|
| What it is | Your own advance instruction | You appoint donees to decide for you | The court appoints a deputy |
| Made when | While you are of sound mind | While you still have mental capacity | After capacity has already been lost |
| Scope | Extraordinary life-sustaining treatment only, in terminal illness with loss of the ability to express wishes | Personal welfare and/or property and affairs, broadly | Defined by the court order |
| Governing law | Advance Medical Directive Act | Mental Capacity Act | Mental Capacity Act |
| Registered with | Registry of Advance Medical Directives | Office of the Public Guardian | Court order; supervision by the OPG |
Put practically: an AMD answers one question, once, about the end of life. A Lasting Power of Attorney answers the far more common problem of who pays your bills, manages your flat and decides on your care if a stroke or dementia takes away your capacity to decide. If you lose capacity without an LPA in place, your family cannot simply step in. They have to apply to court for deputyship, which is slower, costlier and supervised.
The AMD is also not a will. A will deals with your property after death and has no effect while you are alive; the AMD has effect only while you are alive and says nothing about property. People sometimes assume “I’ve done my will” covers all of this. It does not. If the distinctions between the capacity documents are what you are trying to untangle, our comparison of an LPA, a will and deputyship takes it further.
Do you need one?
There is no obligation to make an AMD and no disadvantage in not making one. It is a personal decision, and for many people it turns on religious or philosophical conviction as much as on medicine.
The people who most often find it worth doing are those with strong views about how they want the end of life handled, and those who have watched a family member go through a prolonged terminal illness and want to spare their own family the burden of that decision. That second reason is the practical one: without any indication of your wishes, the weight of the decision falls on people who are grieving and who may disagree with one another.
The considerations against are equally legitimate. Some people prefer to leave the decision to the clinical judgement of the treating team at the time, in the light of facts nobody can foresee today. Some hold religious beliefs that make an advance refusal inappropriate. Both positions are entirely reasonable, and neither is a failure of planning.
Talk to your doctor, and then to your family
Because a doctor has to witness the directive anyway, the conversation with your own doctor is the natural place to work out whether an AMD reflects what you actually want. They can explain what extraordinary life-sustaining treatment means in real clinical terms, which is more useful than any general description.
Telling your family is a separate step and, in most cases, a kind one, though you are under no obligation to, and the confidentiality protections mean nobody else can tell them either. A family that knows your decision and your reasons is far less likely to argue about it at the worst possible moment.
Where the AMD fits in the rest of your planning
Treat the AMD as one item on a list rather than the whole exercise. A reasonably complete set for most people is a will, an LPA, up-to-date CPF and insurance nominations, and, if you want it, an AMD. The documents do not overlap, and having one does not reduce the need for the others.
Nominations are the item most often forgotten. A CPF nomination operates outside your will, and an insurance nomination does too. Our estate planning checklist runs through the full set and the order to do them in, and the broader wills, probate and capacity planning guide covers how the pieces relate.
For the current AMD forms, the registration process and the revocation procedure, go to the Ministry of Health, or ask your doctor at your next appointment.
