Filing a Marchman Act Petition for Your Sibling? Talk With Us First.

Marchman Act Petition for Sibling in Florida | Robinson Casey

Yes, a sibling can file a Marchman Act petition in Florida. A Marchman Act petition for sibling Florida cases asks a judge to order an involuntary assessment and, if the criteria are met, involuntary treatment for an adult with substance abuse impairment. This guide explains who may file, what the court looks for, how the process moves, and what a petitioner’s attorney handles. Robinson & Casey limits its practice to Marchman Act petitions and guardianship matters for families across South Florida, including Miami-Dade County, and statewide.

When a Sibling Needs a Marchman Act Petition

A sibling can file a Marchman Act petition when an adult brother or sister’s substance use leaves them unable to keep themselves safe.

You may be living this already. Your brother drinks until he can’t hold a job. Your sister refuses treatment and keeps ending up in emergency rooms. Money disappears, bills pile up, and each crisis seems to bring you back to the same place.

The Marchman Act is Florida’s court process for substance abuse impairment. Its rules sit in Chapter 397 of the Florida Statutes.

For an adult, § 397.68112 lets several people file. That includes a spouse or legal guardian, any relative, a service provider, or an adult with direct personal knowledge of the impairment and the prior course of assessment and treatment. A sibling is a relative, so a sibling can be the petitioner.

The petition asks the court to order involuntary treatment services. For an adult, it may be filed by the person’s spouse or legal guardian, any relative, a service provider, or an adult who has direct personal knowledge of the person’s substance abuse impairment and prior course of assessment and treatment. If the legal criteria are met, it can also ask for involuntary treatment services.

What Florida Courts Look For Under the Marchman Act

The court needs a good faith reason to believe your loved one meets the criteria for involuntary admission. Those criteria are in § 397.675.

The person must have a substance abuse impairment, or a substance use disorder with a co-occurring mental health disorder. Because of that condition, the person has lost the power of self-control with respect to substance use.

The person must also meet one of two further tests:

• They need substance abuse services and, because of the impairment, can’t appreciate that need or make a rational decision about it. A simple refusal of services is not, by itself, proof of lost judgment.
• Without care, they are likely to neglect themselves or refuse care in a way that poses a real and present threat of substantial harm, and it is not apparent that the harm can be avoided through willing, able, and responsible family members or friends or other services. Or there is a substantial likelihood that they have inflicted, or threatened or attempted to inflict, or, unless admitted, are likely to inflict, physical harm on themselves or others.

Your petition must name both of you, state your relationship, and set out specific facts. A recent, concrete incident carries more weight than a general worry. Whether your facts meet these tests depends on the facts.

Marchman Act or Baker Act: Which Law Applies

The Marchman Act applies when substance use is the core problem. Crises driven by mental illness alone follow different rules, so the facts decide which route fits.

Many families face both at once. Florida’s criteria in § 397.675 cover a substance use disorder paired with a co-occurring mental health disorder, so that overlap matters.

Ask yourself what drives the danger most. Is it alcohol or drugs, or psychiatric symptoms? Families often describe a cycle: a hospital stay, a release, missed medication, then use again. Keep dates and records of each episode. A pattern like that gives the court concrete facts to weigh.

How the Marchman Act Process Works, Step by Step

The petition goes to the clerk, a hearing is set within 10 court working days unless a continuance is granted, and the court may appoint a magistrate to preside at the hearing.

1. Consultation and timeline. Your attorney reviews the facts, records, and past treatment, then builds a dated timeline.
2. Filing. Under Fla. Stat. § 397.681(1), a petition for involuntary treatment of a substance abuse impaired person must be filed with the clerk of the court in the county where the person is located, and the clerk may not charge a fee for filing that petition. The clerk may not charge a filing fee (§ 397.681).
3. The respondent has the right to counsel at every stage, unless the respondent is present and the court finds a knowing, intelligent, and voluntary waiver, and a respondent who wants counsel but cannot afford private counsel has the right to court-appointed counsel. The court may also appoint counsel without regard to the respondent’s wishes if it believes the respondent needs it. The petition and hearing notice go to your loved one, the petitioner, the attorney if known, a spouse or guardian if applicable, and others the court directs (§ 397.68151).
4. Emergency order, if needed. The court may rely on the petition alone and enter an ex parte order for assessment and stabilization (§ 397.6818). Under Fla. Stat. § 397.6818(1), when emergency circumstances exist, the court may rely solely on the contents of the petition and, without the appointment of an attorney, enter an ex parte order for the respondent’s involuntary assessment and stabilization.
5. Hearing. Testimony is under oath and the proceeding is recorded. The court hears family members familiar with the history and the assessment results (§ 397.6957).
6. Order and renewal. If the conditions are proved by clear and convincing evidence, the court may order up to 90 days of involuntary treatment (§ 397.697). A renewal petition can extend that period (§ 397.6975).

Timing varies by court and case.

What a Marchman Act Attorney Handles for the Petitioner

A Marchman Act attorney for the petitioner prepares the filing, organizes the proof, and guides you through each hearing.

• Drafting the petition with the required contents, including both names, your relationship, and specific facts (§ 397.68141).
• Organizing proof such as police reports, medical or treatment records, and statements from people who saw the behavior.
• Attending filings and hearings, and explaining each step to you in writing.
• Explaining what happens after an order. Your loved one has the right to counsel at every stage, which he or she may waive only if present and the court finds the waiver is made knowingly, intelligently, and voluntarily (§ 397.681).
• Discussing longer-term needs. If your sibling later can’t manage money or daily decisions, guardianship is a separate court process we can discuss at the same consultation.

Why Families Work With Robinson Casey

Robinson & Casey limits its practice to Marchman Act petitions and guardianship matters. The firm serves families across South Florida, including Miami-Dade County, and statewide.

Richard J. Casey III, Esq. is the responsible lawyer for this page. Our attorneys and our team focus on these two areas, so your questions stay with people working in this area of law.

The practice covers the Marchman Act, involuntary commitment for addiction, emergency temporary guardianship, plenary guardianship, limited guardianship, and mental health guardianship.

Many families come to us after a Marchman situation raises guardianship questions. We can explain how the two routes differ, in plain terms, at the same consultation.

Questions Families Ask Before Filing

Most families ask the same few questions before they file. The short answers below cover them.

If your sibling’s substance use has put his or her safety, health, or money at risk, you don’t have to sort out this court process alone. Call (561) 849-4149 or visit our contact page to talk through your situation with our team.