A well-drafted letter of instruction helps to ensure a mental capacity assessment is clear, decision-specific, and legally robust. This guide explains what solicitors, deputies, and legal professionals typically include when instructing a mental capacity assessor, how clear instructions support assessments under the Mental Capacity Act 2005, and how to reduce delays or follow-up queries in Court of Protection, personal injury, and medical negligence cases.
Letters of instruction are often the first point of contact between a legal professional and a mental capacity assessor. They set out why an assessment is needed, what decision(s) must be considered, and how the findings are likely to be used.
For legal professionals, such as solicitors and deputies, a clear letter of instruction helps ensure the assessment focuses on the right issues from the outset. It also supports the assessor in applying the Mental Capacity Act 2005 correctly and producing a report that is clear, decision-specific, and fit for its intended legal purpose.
What is a letter of instruction in a mental capacity assessment?
A letter of instruction is a formal request from a solicitor, deputy, or other authorised professional asking an assessor to carry out a mental capacity assessment.
In practice, it does more than confirm the task. It explains:
- Who is being assessed
- Why is the assessment needed
- Which decision or decisions require assessment
- The legal or factual background
- How the assessment report will be used
For mental capacity assessors, the letter of instruction provides the practical framework for the assessment. It explains the legal and factual context, clarifies the decision to be assessed, and helps ensure the assessor applies the Mental Capacity Act 2005 to the correct issue, rather than assessing capacity in overly broad or general terms.
When are letters of instruction used in mental capacity assessments?
Solicitors, deputies, and other legal professionals issue letters of instruction across a wide range of legal contexts. These include, but are not limited to:
- Court of Protection capacity assessment instructions, including COP3 reports
- Lasting Power of Attorney assessments
- Deputyship-related decisions
- Capacity to litigate in personal injury or medical negligence claims or other legal proceedings
- Capacity to make financial gifts
- Capacity to enter into agreements, such as prenuptial or post-nuptial agreements
- Testamentary capacity assessments
Although the decision type varies from one case to another, the structure and purpose of solicitor instructions for mental capacity assessments usually remain consistent.
Why clear instructions matter in mental capacity assessments
Clear letters of instruction help assessments run smoothly from the outset. They reduce the need for follow-up queries for additional information and avoid delays. They also support the mental capacity assessor in producing a focused, defensible report.
For example, an instruction that asks whether someone “has capacity to manage their finances” may be too broad for the purposes of the Mental Capacity Act 2005. Clarifying whether the decision relates to a specific transaction, gift, agreement, or ongoing financial management helps ensure the assessment remains focused and legally meaningful.
From a legal perspective, clear letters of instruction also help ensure that:
- The assessment remains decision-specific
- The statutory test under the Mental Capacity Act 2005 is applied correctly
- The assessor understands the purpose and end use of the report
- The assessment evidence aligns with court or solicitor expectations
In complex cases, especially those involving deputies, personal injury settlements, or medical negligence claims, clarity at the instruction stage can prevent misunderstandings later.
Keeping instructions decision-specific under the Mental Capacity Act 2005
One of the most important principles under the Mental Capacity Act 2005 is that capacity is decision-specific. A person may have the capacity to make one decision but lack the capacity to make another.
When instructing a mental capacity assessor, it helps to identify clearly:
- The exact decision or decisions to be assessed
- Whether those decisions relate to property and financial affairs, health and welfare, or legal matters
What core information usually supports a thorough mental capacity assessment?
Although there is no single required format, certain information usually supports a thorough and efficient mental capacity assessment. This often includes:
- The individual’s full name, date of birth, and current address
- The referrer’s role and legal authority, such as a solicitor or a deputy
- The specific decision(s) requiring assessment
- The reason the assessment is being requested
- Any relevant deadlines or urgency
- Any relevant background information that the assessor will need to consider to reach a decision about the individual’s capacity
Providing this information allows the assessor to prepare properly and avoid making assumptions or drawing vague conclusions about the decision being assessed. For example, understanding the referrer’s legal authority or any urgency attached to the assessment helps the assessor plan the scope, timing, and structure of the assessment from the outset.
How should the decision be framed without over-directing the assessment?
Letters of instruction often include professional concerns, background advice, or known risks. This context is helpful, particularly in cases involving financial vulnerability or safeguarding concerns.
At the same time, it usually helps to frame the decision neutrally. The role of the assessor is to determine whether the individual can:
- Understand the relevant information
- Retain that information
- Use or weigh it as part of the decision-making process
- Communicate their decision
Clear framing supports this process without directing the outcome. It allows the assessor to remain independent while understanding the real-world context of the decision.
What if more than one decision needs to be assessed?
In practice, many letters of instruction involve more than one decision. This is especially common where deputies are involved or where financial and legal decisions overlap. For example, a single instruction may ask for assessment of:
- Capacity to enter into an agreement
- Capacity to litigate
- Capacity to make a gift or loan
This is entirely appropriate. Where multiple decisions are involved, it can help to make it clear that each decision is assessed separately and what different legal tests apply.
This clarity helps ensure the assessment remains structured and avoids conflating separate capacity issues.
How much background and context is helpful?
Background information often strengthens a letter of instruction and, hence, the mental capacity assessment. It helps the assessor understand how an impairment or disturbance of the mind or brain affects day-to-day decision-making. For example, when a person has fluctuating capacity following a brain injury or stroke, background information about good and bad days can help the assessor time the assessment appropriately.
Relevant background may include:
- Medical history or diagnoses
- Brain injury, stroke, or cognitive impairment
- Behavioural or memory difficulties
- Financial vulnerability or safeguarding concerns
- Family or relational context where relevant
There is no fixed rule on how much detail to include. Some letters are brief, while others provide extensive background. Both approaches can be appropriate, depending on the case.
What supporting documents can be included with mental capacity assessment instructions?
Where available, supporting documents can add helpful context and reduce follow-up queries. These might include:
- Medical records or discharge summaries
- Previous mental capacity assessments
- Court orders or deputyship orders
- Draft agreements or legal documents
- COP forms or pleadings in Court of Protection cases
These documents are not always required, but they often help the assessor understand the wider picture and tailor the assessment accordingly.
What are some common points assessors may seek clarification on?
Even with detailed solicitor instructions, assessors sometimes need to clarify points before proceeding. Common areas include:
- The specific decision or decisions to be assessed
- The intended use of the report
- Whether urgency affects the scope of the assessment
- Who will fund the assessment and report
Clear initial instructions often reduce the need for these follow-up questions and help assessments proceed more efficiently.
A practical sense-check before sending a letter of instruction
Before sending a letter of instruction, it can help to check that:
- The decision is clearly identified
- The legal context is explained
- There is enough information to ensure the assessor understands why the assessment is needed
- Any relevant deadlines are highlighted
- Supporting documents are attached where appropriate
This is not a checklist to follow rigidly, but a useful sense-check in busy practice.
Working collaboratively when instructing a mental capacity assessor
Mental capacity assessments work best when legal professionals and mental capacity assessors work collaboratively. Clear instructions support this relationship and help ensure assessments are both legally sound and person-centred.
Experienced mental capacity assessors understand the pressure legal professionals face and aim to provide clear, structured reports that meet the requirements of the Mental Capacity Act 2005 and the Court of Protection.
Conclusion
A well-prepared letter of instruction supports accurate, decision-specific mental capacity assessments. It helps assessors apply the Mental Capacity Act 2005 correctly, reduces delays, and supports clear outcomes that withstand legal scrutiny.
OFH Care works closely with solicitors and deputies across England and Wales to provide clear, legally robust mental capacity assessments. Get in touch if you would like to discuss instruction or need support with an assessment.