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GUIDES

Mental capacity assessments for professional deputies

A deputy must act within the order and cannot decide a matter the person can decide themselves. Keep capacity evidence proportionate and current, support retained abilities and seek reassessment when a particular decision or a change in circumstances calls for it.

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Author and Publication

Author: Nellie Supports Ltd

Publication Date: 15/05/2026

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Citation

Department for Constitutional Affairs (2007) Mental Capacity Act 2005: Code of Practice. London: The Stationery Office.

Copyright

Copyright © 2026 Nellie Supports Ltd. All rights reserved.

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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.

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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.

Abstract

A deputy must act within the order and cannot decide a matter the person can decide themselves. Keep capacity evidence proportionate and current, support retained abilities and seek reassessment when a particular decision or a change in circumstances calls for it. This guide covers the relevant evidence, support, process and limits in England and Wales.

What is on this page

A deputy must act within the order and cannot decide a matter the person can decide themselves. Keep capacity evidence proportionate and current, support retained abilities and seek reassessment when a particular decision or a change in circumstances calls for it. COP3 supports an application, while ongoing authority is set by the order. An independent specialist report is not automatically required for every major decision.

Capacity evidence as deputyship infrastructure

Capacity evidence helps define and review the decisions the person can make. A deputy should use relevant existing information and obtain further assessment where justified, rather than rely on an old report for every new matter or commission a new report mechanically.

The appointment stage and beyond

After appointment, consider whether the person can make the actual decision with support. The order does not remove all decision-making rights. A material change, uncertainty about a different decision or a court direction may require further evidence.

Decisions inside the deputyship that need their own evidence

A property sale, gift or statutory-will application may require specific evidence and authority. Litigation and welfare issues raise distinct capacity and procedural questions. Confirm the deputy’s powers and the court’s directions before commissioning work.

Supporting what the client can still decide

Support the person to make decisions they can make and record their participation and wishes on matters they cannot decide. Use accessible information and practical assistance. Do not assume that needing help with one aspect of affairs justifies taking over all everyday spending.

Fluctuation, recovery and discharge

Where there are signs of recovery or a changing presentation, review the relevant evidence and obtain reassessment if needed. A deputy cannot decide a matter the person can decide themselves. Seek advice on variation or discharge of the order rather than treating the original appointment as a permanent capacity finding.

Evidence for the OPG and the supervision cycle

Keep a clear record of significant decisions, authority, capacity considerations, participation, best interests and expenditure as required for supervision. A new specialist report is not the only possible evidence, and cannot guarantee that an OPG query will be resolved without further information.

Contested caseloads and family-facing evidence

Where accounts differ, record and consider them fairly and protect the person’s opportunity to speak. An external specialist may help where a conflict or complex question warrants it. Independent evidence does not necessarily resolve family disagreement.

Planning instructions proportionately

Agree the particular decisions, relevant records, support needs, report format, timing and cost for each instruction. Consistent arrangements may help administration, but do not replace consideration of the individual or justify a claim that the court recognises a provider’s reports as a matter of course.

Key takeaway

Keep the order and current decision-making abilities in view. Support retained choices, obtain proportionate evidence where needed and seek further authority for steps outside the powers held. An assessment informs those responsibilities without transferring them to the assessor.

Frequently asked questions

What type of assessment is right for professional deputies?

It depends on the exact decision, the evidence available, the purpose of the report and whether the matter is family-led, professional, solicitor-led or court-related. An independent, decision-specific assessment matched to those factors carries the most weight.

Does a diagnosis automatically mean someone lacks capacity?

No. A diagnosis does not establish lack of capacity. For a decision under the Mental Capacity Act, consider the relevant information and practicable support, then assess understanding, retention, use or weighing and communication by any means. Any inability must be caused by an impairment of, or disturbance in the functioning of, the mind or brain. Will-making has its own legal test.

What should a report cover for mental capacity assessments for professional deputies?

A report should identify the decision, time, information, support, findings, causal reasoning and limitations. Use formal specialist evidence where uncertainty, complexity or a direction warrants it. Major value or anticipated scrutiny alone does not make a new paid report mandatory.

Related mental capacity assessment pages

The related guides below provide further explanation of the decisions, evidence and legal processes discussed here.

COP3 Mental Capacity Assessment

What decisions can a COP3 cover?

What happens after a COP3 is completed?

Read guide

Practical next steps

Check the order, the particular decision and any evidence of recovery or fluctuation. Keep the person involved, seek proportionate clarification or reassessment where needed and apply to vary or discharge the order where appropriate.

Primary sources and official guidance

Mental Capacity Act 2005

Mental Capacity Act Code of Practice

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