The Doctor's Letter: Capacity, Dementia, and When a Florida POA Still Works

Lucille's morning

Lucille is 80, lives in New Smyrna Beach, and was diagnosed with moderate dementia last month. She is a composite drawn from patterns I see often in practice, not an actual client, but her situation is real for a lot of Florida families this year. Her neurologist's note says "moderate dementia." Her daughter is now wondering whether that single phrase means the family needs to go to court and ask a judge to appoint a guardian, or whether Lucille can still sign a power of attorney and get her affairs in order herself.

Here is the good news I try to give families in that first phone call: a diagnosis is a medical label, not a legal verdict. Florida guardianship law, found in Chapter 744 of the Florida Statutes, is a court process that appoints someone to make decisions for a person a judge has found incapacitated, and it is meant to be used only when less restrictive tools will not work. A diagnosis alone does not answer whether those less restrictive tools, like a power of attorney, are still available to Lucille. The real question is about capacity, and capacity is a much more specific, much more hopeful concept than most families expect.

Legal capacity is not the same thing as a medical diagnosis

Florida law does not ask whether someone has dementia, Parkinson's, a stroke history, or any other diagnosis. It asks whether the person understood what they were doing at the time they did it. That distinction matters enormously.

Florida's guardianship statute was substantially revised years ago specifically to move away from tying legal incapacity to a diagnosis. The law now focuses on functional ability: what the person can actually understand, communicate, and decide, not the name of the condition on a chart. A court-appointed examining committee, when one is involved, is not just confirming a diagnosis. Its job is to assess whether the person can exercise specific rights, like the right to contract, to manage property, or to make health care decisions.

That same functional focus applies outside the courtroom, when someone simply wants to sign estate planning documents. For a durable power of attorney, Florida law generally requires what is sometimes called contractual capacity: the person must understand that they are naming an agent, understand roughly what powers that agent will have, and know who the agent is. That is a real but achievable bar for many people with early or moderate dementia, especially during clearer periods of the day.

Capacity is task-specific and time-specific

This is the part families find hardest to absorb, and also the most useful. Capacity in Florida is not one fixed status a person either has or lacks across the board. It can vary by the type of document and by the hour.

• Task-specific: Someone might retain enough understanding to name a trusted agent under a power of attorney, but not enough to manage a complex investment account directly. The law asks whether they understood that particular decision.
• Time-specific: A person can have a lucid interval, a stretch of time in which their thinking is clear enough to meet the legal standard, even if they are confused at other points in the same day. Dementia often produces exactly this pattern: sharper mornings, more confusion by evening, sometimes called "sundowning."

Florida courts have long recognized the lucid interval doctrine. A document signed during a lucid interval can be valid even though the person has a diagnosed cognitive condition, so long as they had the required understanding at that specific moment. This is precisely Lucille's situation. Her family described her as sharper and more herself in the mornings, and more confused as the day wears on. That pattern, documented and taken seriously, can open a real window for signing.

How a Florida attorney actually assesses capacity

I do not take a diagnosis at face value in either direction. A diagnosis of dementia does not automatically disqualify someone, and a clean bill of health does not automatically qualify them either. What I look for, in a private conversation with the client alone, is whether they can tell me in their own words who they want to name as their agent, roughly what that agent would be able to do, and why they are choosing that person over someone else.

I also pay close attention to timing. If a family tells me their loved one is clearest in the morning, we schedule the signing for the morning. I document the conversation, note the date and time, and, where the stakes or family dynamics warrant it, may recommend a contemporaneous letter from the treating physician confirming capacity to execute a specific document on a specific day. That kind of documentation does not guarantee a document will never be questioned later, but it builds a much stronger record than silence would.

The risk of waiting too long

Capacity from a progressive condition like dementia generally narrows over time. It does not always disappear overnight, but the window for a clean, well-documented signing is wider today than it is likely to be in six months or a year. That is not a scare tactic, it is simply the honest trajectory of most dementia diagnoses, and it is the reason I encourage families to act while there is still a lucid, capable version of the conversation to have.

Once a person's capacity has genuinely declined below the legal threshold, a power of attorney, health care surrogate designation, or revocable trust can no longer be validly signed, no matter how well-intentioned the family is. Florida also abolished the old "springing" power of attorney, meaning a POA takes effect as soon as it is signed rather than waiting for a future determination of incapacity. That makes getting the document signed while capacity is clear even more important, not less.

What Lucille could sign now, and what happens if the window closes

If Lucille is genuinely clearer in the mornings and can explain, in her own words, who she wants managing her finances and why, several documents may still be within reach in a single morning appointment:

• A durable power of attorney naming her agent for financial matters
• A health care surrogate designation naming who can make medical decisions if she cannot
• A living will stating her wishes about end-of-life treatment
• A revocable trust, if her estate planning calls for one
• A pre-need guardian designation, which lets her name, in advance, who she would want a court to appoint as guardian if that ever becomes necessary

Each of these is a less restrictive alternative that Florida law and Florida courts favor over full guardianship, and each requires the same basic showing: that Lucille understood the nature and effect of what she was signing at that time. If her family works with an attorney promptly, documents the lucid interval, and perhaps obtains a supporting letter from her neurologist, there is a real, honest path for Lucille to keep directing her own affairs through these tools.

If, instead, the family waits and her condition progresses to the point where she genuinely cannot understand these documents at any point in the day, then a power of attorney is no longer something she can validly sign. At that stage, guardianship under Chapter 744 becomes the only route left: a petition to determine incapacity, review by a three-member examining committee, a hearing where Lucille would have the right to her own counsel, and a court determination, limited or plenary, of what decisions she can no longer make for herself.

This article is for general informational purposes only and does not constitute legal advice, nor does reading it create an attorney-client relationship. Florida estate, elder, probate, and real estate law are fact-specific and change over time. Consult a licensed Florida attorney about your individual circumstances. Arthur Simpson, Esq. is licensed to practice law in the State of Florida. Attorney advertising.