
Marchman Act
Grounds for Involuntary Commitment in Florida
Understanding the legal criteria courts use to order treatment for substance use disorders
· Published September 19, 2026
Marchman Act Grounds for Involuntary Commitment in Florida
Florida courts cannot order involuntary commitment for substance abuse based on addiction alone. The law sets specific, narrow grounds that a petition must establish before a court may order involuntary commitment. Understanding these grounds helps families know whether a Marchman Act petition has a legal foundation and when professional guidance is needed.
If someone you care about is struggling with substance abuse and you’re wondering whether involuntary commitment might be appropriate, you may want to learn about the legal options and the grounds the Marchman Act sets out. An attorney can help you talk through your situation.

What the Marchman Act Requires: The Legal Grounds for Commitment
The Marchman Act (Fla. Stat. § 397.675) establishes specific criteria a court must find before ordering involuntary commitment. The law does not permit commitment based on addiction or substance use standing alone. Instead, the statute requires proof of one or more defined grounds that go beyond the fact of addiction itself.
This legal framework exists because civil commitment is a serious deprivation of liberty. Courts must have clear, factual grounds rooted in medical and safety criteria, not in family frustration or moral judgment. Understanding these grounds helps families prepare a petition that addresses what the court will actually consider and clarifies when a Marchman Act petition is legally appropriate.
The Core Criterion: Likelihood of Serious Harm
The primary ground for commitment is that the person is likely to suffer serious bodily injury or death if not committed. The focus is on evidence of likely serious harm to the person, rather than general concern about their situation.
Serious harm includes overdose, organ damage from continued substance use, dangerous behavior while intoxicated, or medical crises triggered by withdrawal or use. Courts may consider evidence of repeated overdoses, medical emergencies, or behavior that places the person in immediate danger.
The court weighs several factors when evaluating this ground:
- Past behavior and medical history: Prior overdoses, emergency room visits, or hospitalizations related to substance use.
- Current substance use patterns: Escalating use, mixing of substances, or use of particularly dangerous drugs.
- Medical condition: Underlying health problems worsened by addiction, such as liver disease, heart problems, or respiratory issues.
- Documented incidents: Specific events showing imminent risk—a recent overdose, a suicide attempt, or dangerous conduct while intoxicated.
The court will not find this ground on speculation or family concern alone. The evidence must establish a real, substantial risk of serious harm based on facts known to those with direct knowledge of the person’s behavior and condition.
Inability to Consent to Treatment
Substance abuse can impair judgment, insight, and the ability to understand the nature and consequences of one’s condition.
The court considers whether the person understands:
- The nature and severity of their substance use disorder.
- The risks and consequences of continued use.
- The need for treatment.
- The benefits and risks of available treatment options.
Repeated refusal of treatment, despite clear evidence of harm, may support a finding of incapacity to consent. The law recognizes that some individuals will not seek help voluntarily, even as their situation worsens. This ground does not mean the person is incompetent in all respects—only that addiction has impaired their ability to make sound decisions about their own treatment.
How Decline and Refusal of Help Are Considered
Courts may also consider the person’s overall condition and any prior efforts to help, as the evidence bears on the statutory grounds. Evidence of escalating substance use, worsening health, job loss, family breakdown, or social decline may bear on the court’s assessment of a petition.
Documented attempts to help are relevant and important:
- Offers of counseling or treatment that have been rejected.
- Prior treatment attempts that failed or were abandoned.
- Interventions by family or friends that were refused.
- Professional recommendations for care that the person has ignored.
The law recognizes that deterioration coupled with resistance to help—especially when help has been offered and refused—may indicate a need for involuntary intervention. This is not punishment; it reflects the reality that addiction can prevent someone from accepting the help they need, even as their condition worsens.
The Role of Medical and Factual Evidence
Petitions must be supported by credible evidence, not assumptions or fears. A physician’s affidavit or testimony about the person’s medical condition and risk may be considered by the court, depending on the circumstances of the case.
Strong evidence includes:
- Medical records: Emergency room visits, hospitalizations, overdose incidents, or diagnoses related to substance use.
- Physician statement: A doctor’s assessment of the person’s medical condition, risk of serious harm, and need for treatment.
- Behavioral documentation: Specific incidents showing deterioration, dangerous conduct, or escalating use.
- Witness testimony: Statements from family, friends, employers, or others with direct knowledge of the person’s behavior and condition.
The court will not order commitment on speculation or family concern alone. The grounds must be established by fact. Knowing what evidence the court may consider is a useful place to start.
Not sure what your next step is?
An attorney can help you talk through your situation.

