Capacity Assessment for Power of Attorney in the NT
Capacity determines everything about an Advance Personal Plan in the Northern Territory. A maker must have capacity to create one. A decision-maker's authority only activates when the maker loses it. And the assessment itself — who conducts it, what it tests, and what it concludes — is not a simple pass/fail. The NT treats capacity as decision-specific and domain-specific, which means a person can lack capacity for one type of decision while retaining it for another.
What Capacity Means Under NT Law
Under the Advance Personal Planning Act 2013, a person has decision-making capacity if they can:
- Understand the nature and effect of the decision
- Retain the information long enough to make the decision
- Use or weigh the information as part of the decision-making process
- Communicate the decision (by any means — speech, writing, gestures, or assistive technology)
This is not a global test. A maker might retain the capacity to decide what they eat for dinner but lack the capacity to understand a complex property sale. The assessment must be matched to the specific decision at hand.
When Capacity Is Assessed
Capacity assessments arise at two distinct points in the APP lifecycle:
At creation. When the APP is being signed, the authorised witness must certify that the maker "appears to understand" the document and is acting voluntarily. This is not a formal medical assessment — it is a professional judgment by the witness. If the witness has doubts, they should decline to witness the signing and suggest a medical capacity assessment before proceeding.
At activation. When the decision-maker needs to begin exercising authority, a qualified medical professional must assess the maker and confirm that they have lost decision-making capacity in the relevant domain. For a financial decision-maker, the assessment must confirm that the maker cannot manage their own financial affairs. For a healthcare decision-maker, it must confirm that the maker cannot make the specific healthcare decision at issue.
Who Conducts the Assessment
The Act does not specify a single category of practitioner. A qualified medical professional conducts the capacity assessment.
In practice, the maker's GP is usually the first point of contact. For complex or disputed cases, a specialist referral is appropriate. In remote NT communities, the available practitioner may be a remote clinic doctor or visiting specialist.
Free Download
Get the Northern Territory — POA Quick-Start Checklist
Everything in this article as a printable checklist — plus action plans and reference guides you can start using today.
The Medical Capacity Letter
When a decision-maker needs to demonstrate to a bank, aged care provider, or government agency that the maker has lost capacity, they may be asked for evidence of that loss, such as a medical capacity letter. This letter should include:
- The practitioner's name, qualifications, and registration details
- The date of the assessment
- The specific domains of incapacity (financial, healthcare, lifestyle)
- The basis for the conclusion (cognitive testing, clinical observation, medical history)
- Whether the incapacity is likely to be temporary or permanent
A letter that says only "the patient lacks capacity" without specifying the domain may not be sufficient for an institution that needs the relevant domain. Banks may ask for specificity — they want to know whether the maker lacks the capacity to manage financial affairs specifically, not just that they have a cognitive impairment.
Capacity and Early Cognitive Decline
A common question: can a parent with early-stage dementia or mild cognitive impairment still create an APP?
The answer is often yes. An early-stage diagnosis does not automatically mean the person lacks decision-making capacity. They may understand perfectly well what an APP is, who they are appointing, and what authority they are granting — even if their memory is declining in other areas.
The key is to act while the window exists. Once capacity declines past the threshold, the opportunity to create an APP closes permanently. For financial or lifestyle authority, the family then uses the NTCAT guardianship pathway; healthcare decisions may instead follow the statutory hierarchy.
If you are navigating a capacity assessment — whether to confirm a parent can still sign an APP, or to activate a decision-maker's authority — the Northern Territory Power of Attorney Kit includes a capacity checklist covering both scenarios.
Get Your Free Northern Territory — POA Quick-Start Checklist
Download the Northern Territory — POA Quick-Start Checklist — a printable guide with checklists, scripts, and action plans you can start using today.