An Alzheimer's diagnosis does not stop a person from updating a will. According to Alzheimer's Society UK guidance, an update counts if the person has testamentary capacity at the exact moment of signing.
Testamentary capacity means the legal ability to make a will. It requires understanding the will and its effects, knowing assets broadly, recognizing expected beneficiaries, and choosing without an impairing delusion. Federal guidance urges completing health, legal, and financial planning early, while the person can still take part and consent, as described by the National Institute on Aging via Alzheimers.gov planning guidance.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What Capacity Means at Signing
- When to Act After Diagnosis
- How to Change a Will
- How to Lower Challenge Risk
What Capacity Means at Signing
Capacity is decision-specific and time-specific. A person may have bad days yet still have a lucid period when understanding is clear. What matters is understanding at the moment the will is signed.
That understanding has four practical parts. The person should know they are making a will, grasp what it does, describe property in broad terms, and name the people expected to benefit. A delusion that changes gifts can defeat capacity.
When to Act After Diagnosis
Act soon after diagnosis, even if documents already exist. The Alzheimer's Association advises reviewing living wills, trusts, and powers of attorney after diagnosis and updating them as needed, in its Planning Ahead for Legal Matters guide.
Early action preserves choice. It lets the person state wishes, sign a durable power of attorney, and clarify health-care instructions. Waiting until speech, memory, or judgment worsens can remove that option.
How to Change a Will
Lawyers often use a codicil for one narrow change, such as replacing an executor. A larger change usually calls for a new will that revokes the prior will.
Both need the same signing and witness formalities, and attorneys typically check capacity at a lucid time. A careful meeting helps prevent later disputes:.
- meet privately with the attorney, without beneficiaries present
- bring a broad asset list and beneficiary names
- explain each change in plain terms
- sign with the required witnesses
- ask about a same-day medical capacity note
How to Lower Challenge Risk
Will changes after diagnosis face higher challenge risk over capacity and undue influence. Private meetings, disinterested witnesses, and a contemporaneous capacity note are important safeguards.
If capacity is lost without a durable power of attorney, the family path gets harder. Relatives generally must seek court guardianship or conservatorship, which is slower and costlier than signing a power of attorney early. Keep signed copies where the agent, executor, and care partner can find them quickly.
