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Author and Publication
Author: Nellie Supports Ltd
Publication Date: 15/05/2026
Citation
Mental Capacity Act 2005, c. 9. Available at: https://www.legislation.gov.uk/ukpga/2005/9/contents
Copywright
Copyright © 2026 Nellie Supports Ltd. All rights reserved.
This article is made available for general information, education and professional reference. It may be downloaded, printed and shared for non-commercial purposes, provided that it is reproduced in full, is not altered in any way, and is properly cited as the work of Nellie Supports Ltd. This material must not be edited, adapted, sold, republished, incorporated into commercial products, or used for commercial training, assessment, report-writing or advisory services without prior written permission from Nellie Supports Ltd.
This article does not constitute legal advice, clinical advice or a substitute for a decision-specific professional assessment. Where legislation, government guidance, court forms or external professional materials are referred to, those materials remain subject to their own copyright, licensing and re-use terms.
Conflicts, risk and undue influence in trustee capacity cases
Trustee capacity cases are unusually exposed to conflict and influence, because the people best placed to raise or resist concerns often have interests of their own: a co-trustee who inherits more control, a beneficiary awaiting distribution, a family member urging an ageing trustee to retire, or the reverse, pressure on a failing trustee to stay and keep signing. A capacity assessment in this territory must be demonstrably independent, see the trustee privately, address the actual trust decisions and record influence checks, because the finding will be read by people motivated to dispute it. This guide explains the risks and how a properly run assessment neutralises them.
Risk is relevant, but it is not the same as incapacity
Risk should be identified carefully because it may form part of what the person needs to weigh. However, risk does not automatically prove lack of capacity. In this area, common concerns include conflicts of interest, pressure from beneficiaries or co-owners, misunderstanding of fiduciary duties, property sale urgency and confusion between being an owner, deputy, attorney and trustee.
Apply the Mental Capacity Act test to this decision
The Mental Capacity Act 2005 requires a structured approach. The person must be presumed to have capacity unless lack of capacity is established. They must be supported to make the decision where practicable, and an unwise decision is not enough on its own. The assessment then asks whether an impairment of, or disturbance in the functioning of, the mind or brain causes the person to be unable to make this decision.
Identify the relevant information
For this topic, relevant information commonly includes the nature of the trust property, fiduciary duties, the need to act for beneficiaries, conflicts of interest, record keeping, decision-making powers and the consequences of remaining in or stepping down from the role. The relevant information should be tailored to the person’s actual circumstances. It should not be copied from a generic template if the person’s options, risks or legal context are different.
Gather evidence before drawing conclusions
The assessment is stronger when the evidence is organised before the conclusion is reached. Useful evidence may include trust deeds, Land Registry information, correspondence about sale or transfer, beneficiary information, professional advice received, and any Court of Protection or Trustee Act material. Where records are missing, contradictory or out of date, the report should say so rather than overstate the certainty of the opinion.
Record practicable steps and communication support
The person should be given a meaningful opportunity to make the decision. This may involve simple language, written summaries, visual aids, additional time, breaks, support with hearing or sight, an interpreter, a familiar setting or a carefully timed appointment. The report should explain what support was tried and whether it helped.
Analyse use and weigh, not just understanding
Many capacity disputes turn on whether the person can use or weigh information, not whether they can repeat it. The assessor should consider how the person reasons through benefits, risks, alternatives and consequences. For capacity to Act as a Trustee, this means looking at the person’s own explanation and whether any impairment prevents them from weighing the material information.
Consider risk, pressure and vulnerability carefully
Risk features should be recorded without turning them into shortcuts. Common issues in this area include conflicts of interest, pressure from beneficiaries or co-owners, misunderstanding of fiduciary duties, property sale urgency and confusion between being an owner, deputy, attorney and trustee. The assessor should distinguish vulnerability, disagreement, family conflict and safeguarding concerns from evidence that the person is unable to make the decision.
What a strong report should contain
A strong report should include the instruction, the specific decision, the legal framework, the relevant information, evidence reviewed, practicable steps, direct assessment findings, functional analysis, causation and a clear conclusion. It should also explain any limitations, such as missing evidence, refusal to engage, fluctuating presentation or the need for further legal advice.
Key takeaway
Trustee capacity is legally and practically distinct from general financial capacity. A person may be able to manage ordinary money decisions but not understand trustee duties. The safest approach is disciplined and evidence-led: define the decision, tailor the relevant information, support the person, apply the functional test and explain the reasoning clearly.
Frequently asked questions
Does a diagnosis automatically mean someone lacks capacity?
No. A diagnosis may explain why capacity is in doubt, but it does not answer the legal question. The assessment must still consider the specific decision, the relevant information, the support provided and whether the person can understand, retain, use or weigh that information and communicate a decision.
What evidence is useful for Capacity to Act as a Trustee?
Beyond the trust papers and records, the relationship map matters: who requested the assessment, who benefits from each possible outcome and who controls access to the trustee. An independent report states these facts openly rather than leaving them for opponents to reveal.
When is a formal assessment for Capacity to Act as a Trustee useful?
Independent formal assessment is essential where any interested party has arranged or resisted the assessment, where the trustee's retirement or replacement changes who controls assets, or where influence over the trustee is itself the concern.
Related mental capacity assessment pages
These internal links help readers move from this guide to the most relevant Nellie Supports service page, assessment option or legal framework page.
Conflict around a trustee's capacity?
Nellie Supports completes trustee capacity assessments across England and Wales, addressed to the trustee functions in question, with a same working day response and every report peer reviewed before delivery. Call 0333 987 5118 or visit the trustee capacity service page.