
Marchman Act Petitions | Miami-Dade & South Florida
Building a Marchman Act Petition? Start With Dated, Specific Facts
Robinson Casey limits its practice to Marchman Act petitions and guardianship matters, helping families across Miami-Dade, South Florida, and statewide organize the evidence Florida courts need.
By Richard J. Casey III, Esq. · Published October 24, 2026
What Evidence Do You Need for a Marchman Act Petition?
If you are asking what evidence do you need for a Marchman Act petition, the short answer is specific, dated facts. A Florida petition has to give a judge reasons to believe a person is impaired by substance use and needs court-ordered help.
Chapter 397 of the Florida Statutes is the state law that sets up the Marchman Act.
If you're worried about a loved one's substance use and unsure what a petition would take, our team offers a free, confidential first consultation with no obligation to continue. Talk it through with our team — the first consultation is free, confidential, and carries no obligation.

Why the Evidence Question Matters Before You File
A petition must show a judge why involuntary help may be needed, not just why you are concerned. Watching someone you love drink, use, or spiral is hard. Many families feel stuck between waiting and acting, and they don’t know what a court will expect.
The statute asks for more than a general complaint. A petition must name the respondent (the person the petition is about) and the petitioner (the person filing it). It must also explain how they’re related and set out the facts that support the request. Fla. Stat. § 397.68141
Those facts carry the case. Good evidence turns a worry into something a judge can test against the law.
Is the Marchman Act Involuntary? How the Process Works
Yes. The Marchman Act lets a court order a person into involuntary assessment and treatment for substance abuse impairment. The process runs through a petition, a court review, and a hearing.
Only certain people may file. For an adult, that includes a spouse or legal guardian, any relative, a service provider, or an adult with direct personal knowledge of the impairment and the person’s prior treatment. Fla. Stat. § 397.68112
Location matters. As the court put it in J.P. v. J.N., “the filing of the petition in the wrong county did not divest the circuit court in Putnam County of jurisdiction.” A wrong county is a venue problem, not a lack of jurisdiction.
The right to a lawyer is covered in a separate guide.
The Core Criteria a Petition Must Address
Under Fla. Stat. § 397.68141, a petition for involuntary services must contain the name of the respondent; the name of the petitioner; the relationship between the respondent and the petitioner; the name of the respondent’s attorney, if known; and the factual allegations presented by the petitioner establishing the need for involuntary services for substance abuse impairment. The core test for involuntary admission is set out in Florida law.
The first part is impairment. The law asks the petition to state the reason for the petitioner’s belief that the person is substance abuse impaired. It also asks whether, because of that impairment, the person has lost the power of self-control with respect to substance abuse.
The second part is need. The statute gives two paths. One is a person who needs substance abuse services but, because of impairment, cannot see that need or make a rational decision about it. A separate path applies where, without care or treatment, the person is likely to suffer from neglect or refuse to care for themselves in a way that poses a real and present threat of substantial harm (and family, friends or other services cannot apparently prevent that harm), or where there is a substantial likelihood that the person has inflicted, threatened, or attempted physical harm, or is likely to inflict it unless admitted.
The third part is the harm path. A petition can show that the person has inflicted or is likely to inflict physical harm on self or others, and must give the reason the petitioner believes so, unless the court orders involuntary services.
Refusal alone isn’t enough. The statute says a refusal to receive services counts only if it is based on judgment so impaired by reason of substance abuse that the person cannot appreciate the need for care or make a rational decision about it. Your petition needs other facts about how impairment affects the person’s judgment.
Types of Evidence That Support a Marchman Act Petition
The strongest petitions rest on specific, dated facts that you saw or heard yourself. Here is what most often supports the required showing.
- Dated behavior. Missed work or school, unsafe driving, lost housing, money trouble, or threats. Write the date, what happened, and who saw it.
- Treatment history. Note what treatment was tried, and whether the person accepted it, left early, or refused it.
- Assessment status. A petition may include a report from a qualified professional who examined the person within 30 days before filing. If the person was never assessed or refused an evaluation, the petition must say so. Fla. Stat. § 397.68141
- Records you can lawfully obtain. Medical, emergency, or police records that show intoxication, overdose, or injury.
- Messages. Texts where the person talks about use or turns down help.
- Witnesses. Family members with firsthand knowledge of the person’s history. The court hears testimony from them, and the court may also order drug tests.
Which supporting documents a judge needs varies from case to case.
Evidence That Weakens a Petition: What to Avoid
Vague claims and guesses about motives weaken a petition the most.
- Broad statements. “He’s always drunk” gives no date, example, or witness to check.
- Secondhand stories only. If you saw something yourself, describe it in your own words. Relying only on what others told you leaves gaps.
- Mixing guesses with facts. Separate what you saw from what you assume about the person’s intent.
- A thin petition. The court in D.H. v. K.J.R. concluded that because the “petition did not establish a good faith reason to believe D.H. met the statutory criteria for involuntary assessment and stabilization, the trial court erred in entering the ex parte order.”
- Expecting the court to call the professional. As the opinion in J.C. v. State put it, the court “failed to follow the applicable statute by essentially functioning as the absent petitioner.” The Fifth District reversed where the trial court called and examined the only witness while the petitioner was absent. The Fourth District has certified conflict with that line of cases, so treat this as Fifth District law.
A simple, dated log helps you organize facts for the petition and for any hearing.
Not sure what your next step is?
Talk it through with our team — the first consultation is free, confidential, and carries no obligation.
Marchman Act and Baker Act: Why the Evidence Differs
The Marchman Act centers on substance use, so its evidence focuses on use history and the conduct tied to it. Florida also has the Baker Act, a separate process for mental health concerns. This guide covers only the Marchman Act.
Some families face both concerns. The Marchman criteria can reach a person with a substance use disorder and a co-occurring mental health disorder, so mental health facts can belong in the petition. Whether the Marchman Act fits your facts depends on the facts.
The federal confidentiality statute, 42 U.S.C. § 290dd-2, protects records kept by certain federally conducted, regulated or assisted substance use disorder programs.

Telling Your Loved One and Next Steps
The next step is to write down what you have seen and decide when to reach out to us. Start with the facts you can confirm yourself.
You may be worried about a loved one’s health and safety right now. This decision feels heavy, and it’s okay to take time to get the facts straight. Many families also wonder how to tell a loved one that a petition is coming. A separate guide covers that conversation.
Common Questions
What evidence do you need for a Marchman Act petition?
A petition needs dated facts showing substance abuse impairment, loss of self-control, and either a risk of harm or a need for care the person cannot accept. Fla. Stat. § 397.68141
If your family is weighing a petition right now, Robinson Casey offers a free first consultation that is confidential and carries no obligation to continue. Call (561) 849-4149 or use our contact page. Richard J. Casey III, Esq.
How Our Practice Helps Families Prepare
Organizing the Timeline
We help you arrange dated events into a clear, chronological account that the court can follow.
Documenting Risk and Harm
We identify the incidents that show safety concerns and gather the records that support them.
Identifying Witnesses
We help you determine who has direct knowledge of the person's condition and how their observations can be presented.
Clear Guidance From the Start
Our team explains each step of the process in plain language so you know what to expect.
Avoid General Statements
Phrases like 'he is always drinking' are hard for a court to act on. Write down what happened, when it happened, and who saw it, then bring those notes to your consultation.
Evidence Families Often Organize
Dated Incidents
A dated log of specific episodes, including what occurred, where, and what was done in response.
Witness Observations
Accounts from family members, caregivers, or others who have seen the person's behavior firsthand.
Medical and Treatment Records
Records from doctors, hospitals, or treatment providers that document the person's condition and prior care.
Prior Care Attempts
Information about past treatment, refusals of care, or efforts to help that did not succeed.
