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Guardianship and Marchman Act | Miami-Dade and South Florida

When a Medical Power of Attorney and a Guardianship Order Collide

Families often discover that a document signed years ago no longer fits the current situation. Here is how to think through the question and where to start.

Casey III, Esq. · Published November 9, 2026

Finding a court notice or a health care document you didn’t expect can leave your family scrambling for answers. Here is the short version: a guardianship does not automatically cancel a medical power of attorney or advance directive, but a Florida court can change who makes health care decisions for your loved one. Whether a given order displaces a given document depends on the facts.

Short answer: a guardianship can override a medical power of attorney, but only in certain circumstances

A court can change who makes health care decisions, but it has to say so in its order. In each guardianship case, the court must check whether your loved one signed a valid advance directive before losing capacity. Fla. Stat. § 744.3115 If one exists, the order must spell out what authority the guardian has over health care and what authority the surrogate keeps.

Two terms come up often. A guardian is the person a court appoints to act for someone found incapacitated. A health care surrogate is the person named in a written designation to make medical decisions when your loved one cannot, and that authority is exercisable immediately without the necessity for a determination of incapacity if the document says so.

So the document isn’t simply erased. A judge weighs it, and the order divides the authority. That split is where most of these disputes begin.

When a court notice or a health care document leaves your family unsure who decides, we're glad to talk through those papers with you. Talk it through with our team — the first consultation is free, confidential, and carries no obligation.

Three adults sit across a table in an office, discussing legal documents in a formal meeting.

Three separate Florida tools: power of attorney, health care surrogate, and guardianship

Under Fla. Stat. § 709.2104, a power of attorney is durable if it contains the statutory words that it is not terminated by the principal’s later incapacity except as provided in chapter 709, Florida Statutes, or similar words showing the principal intends the authority to be exercisable despite later incapacity. Each one works differently, so it helps to know which one a document or order belongs to.

Durable power of attorney (Chapter 709). An agent acts for the person who signed it, often on money matters. Except as otherwise provided in chapter 709, a power of attorney stays in force after incapacity if it contains the statutory words saying so, or similar words showing that intent. Fla. Stat. § 709.2104

Fla. Stat. § 765.202

Guardianship (Chapter 744). A court-supervised process in which a judge appoints a guardian for a person found incapacitated. Fla. Stat. § 744.361

The three can coexist. Conflicts start when a petition is filed while a document already names someone to act. Then the court has to decide which tool controls which decision.

When a guardianship can override an existing medical power of attorney

A guardian must be appointed to exercise the person’s delegable rights when the court finds that no alternative to guardianship will sufficiently address the person’s problems. Fla. Stat. § 744.331 In the same statute, a guardian may not be appointed if the court finds there is an alternative to guardianship which will sufficiently address the problems of the incapacitated person. That is why the court looks closely at existing documents before it chooses a guardian.

The process starts with an examining committee. The examining committee is appointed by the court. One member must be a psychiatrist or other physician. Fla. Stat. § 744.331 Notice goes to your loved one, to that person’s attorney, and to next of kin named in the petition.

Under § 744.3115, on a motion by any interested person or on its own motion, and with notice to the surrogate, next of kin and others, a court may change or end the authority of a health care surrogate to make health care decisions for a ward (a person under guardianship) on the grounds listed in § 765.105, or if the surrogate is unwilling or unable to act. Fla. Stat. § 765.105

Fla. Stat. § 765.204

If the root concern is substance use, read about involuntary commitment for addiction. That process runs on its own track.

How a durable power of attorney or advance directive can help avoid a guardianship

A valid planning document can help a family avoid a guardianship. It helps most when it was properly signed and its wording covers the decisions at hand. The document still has to meet the statute’s requirements, and a court still reviews it.

Under § 744.3115, if a court finds that a health care surrogate designation or durable power of attorney is an alternative to guardianship for health care decisions, the agent may decide without a court order. That holds even if the same person was appointed guardian for other rights. Fla. Stat. § 744.3115

Timing matters. While the principal has capacity, the principal’s wishes control. Fla. Stat. § 765.204

While a principal has decisionmaking capacity, the principal’s wishes are controlling under Fla. Stat. § 765.204. Revoking a power of attorney by a later signed writing is addressed in § 709.2110. Signing a new one does not, by itself, revoke an older one. Fla. Stat. § 709.2110

Reviewing the wording, scope, and any conflict between documents helps a family see what each one can and cannot do.

What a guardian does, and how medical decisions fit in

A guardian is a fiduciary. The guardian acts within the rights the court assigns, must act in good faith, and may not act against the ward’s best interests under the circumstances. Fla. Stat. § 744.361

A guardian of the property and a guardian of the person have different jobs. If the court authorizes it, a guardian of the property takes possession of the ward’s property and income. Those funds pay debts, taxes, and expenses, and the care, support, and education of the ward, as provided for under the terms of the guardianship plan or by law. A guardian of the person must consider the ward’s expressed desires. The guardian must also allow contact with family and friends unless that contact may cause harm. Fla. Stat. § 744.361

The order decides health care authority. It states what authority, if any, the guardian has, because a guardian may exercise only those rights that have been removed from the ward and delegated to the guardian. Guardianships can be broad or narrow. A person is determined to be incapacitated only with respect to the rights specified in the court’s order, so a limited order covers fewer decisions. The firm’s guardianship work includes plenary, limited, mental health, and emergency temporary matters.

Read the order closely. Rights the order does not hand to the guardian stay with the ward.

Key differences between guardianship and a power of attorney

The biggest difference is who creates the arrangement. The person signs a power of attorney. A court creates a guardianship through an incapacity process. Fla. Stat. § 744.331

Court oversight also differs. Fla. Stat. § 744.3203

Changing or ending each one also differs. The principal can revoke a power of attorney by a later signed writing and give notice to the agent. A guardianship can be revisited. If the instrument has been judicially determined to be valid, or if, after a guardian is appointed, a petition alleges that there is an alternative to guardianship that will sufficiently address the ward’s problems, the court must review the continued need for a guardian. Fla. Stat. § 744.462

Neither tool is always the better choice. Each fits different facts, so compare the document’s wording with the court papers in front of you.

Not sure what your next step is?

Talk it through with our team — the first consultation is free, confidential, and carries no obligation.

Disadvantages of a durable power of attorney

The main drawback is that the agent holds real authority. After the principal loses capacity, a durable power of attorney may keep certain authority exercisable by the agent, and appointing a guardian does not stop the court from deciding that such authority remains in effect.

A court can act when an agent misuses that power. Under Florida law, once incapacity proceedings are underway and until the court enters an order determining incapacity, a power of attorney the alleged incapacitated person granted to a parent, spouse, child, or grandchild is suspended when the petitioner files a motion stating that that specific power of attorney should be suspended on a listed ground, such as the agent having abused powers or a danger that the person’s property may be wasted, misappropriated, or lost unless the agent’s authority is suspended (Fla. Stat. § 744.3203). Fla. Stat. § 765.105

Three mistakes cause trouble often enough to name. Fla. Stat. § 709.2104 Second, a power of attorney is durable if it contains the words stated in that section, or similar words showing the principal’s intent that the authority be exercisable notwithstanding the principal’s subsequent incapacity. Third, a newer power of attorney does not automatically cancel an older one.

Frequently asked questions

Does a power of attorney override guardianship?

Not automatically. A power of attorney is a document the person signed, while a guardianship order sets what the guardian may do.

What does a guardian do?

A guardian acts for the ward within the rights the court gives. The guardian must act in good faith and in the ward’s best interests.

Can a family member ask a court to review a surrogate’s decision?

Yes.

Does a guardian have to file an advance directive found later?

Yes. The guardian must file it with the court as soon as is reasonable after discovering it, and no later than the earliest of the due date for the initial guardianship report, the annual guardianship plan, or the filing of a petition about life-prolonging procedures.

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Talk with Robinson Casey about your family’s situation

A court notice, a medical decision that can’t wait, or a document that no longer seems to match your loved one’s wishes is hard to face. Robinson Casey limits its practice to Marchman Act petitions and guardianship matters. The firm serves families across South Florida, including Miami-Dade, and statewide. Richard J. Casey III, Esq. is the responsible lawyer for this page.

Bring the power of attorney, any health care advance directive, and any guardianship papers or court notices. Your first consultation is free, confidential, and comes with no obligation to continue. Call (561) 849-4700 or use the contact page to talk through what those papers say.

The information on this website is for general informational purposes only and does not constitute legal advice or create an attorney-client relationship. Results in prior cases do not guarantee similar outcomes in future matters. Please consult a licensed Florida attorney for advice specific to your situation. Robinson Casey, 6400 Congress Ave #2050, Boca Raton, FL 33487.

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Robinson Casey focuses on Marchman Act petitions and guardianship matters for families in Miami-Dade, South Florida and across Florida.

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Our team handles emergency temporary guardianship matters when a family cannot wait for a routine court calendar.

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Do not act on a document until you understand it

Relying on the wrong paperwork can delay care and create confusion with hospitals, facilities and the court. Review your medical power of attorney and any guardianship order with an attorney before you act on either one.

Matters we handle

Marchman Act petitions

Robinson Casey assists families who are seeking court-ordered assessment or treatment for a loved one struggling with substance use.

Guardianship

We help families through guardianship proceedings, including plenary and limited guardianship, and the mental health guardianship matters that arise when a loved one cannot manage personal or financial decisions.

Emergency temporary guardianship

When a loved one faces an immediate risk, our team helps families seek emergency temporary guardianship while the matter moves through the court.

Involuntary commitment for addiction

We represent families pursuing involuntary commitment for addiction under the Marchman Act, from the initial petition through the court process.

Related practice areas

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