Washington MP 303: 14- or 90-Day Commitment Petition

After an initial detention in Washington, the MP 303 asks the superior court to order involuntary treatment: a 14-day commitment, a 90-day commitment, or a 90-day less restrictive alternative (LRA) for a mental disorder, substance use disorder or both. A clinician meets it as one of the two examining professionals at the facility providing evaluation services who sign declarations supporting the petition.

Who completes it

Facility professional staff or the designated crisis responder who filed the initial detention petition completes the petition. A physician, physician assistant or psychiatric ARNP and a second examiner (including a mental health or substance use disorder professional) each sign that they examined the respondent and reviewed it.

Submitting and payment

How to submit it
The petition is filed with the superior court clerk in the county where the person is detained. A Word version is posted for completion because the PDF has no fillable fields.

Good to know

  • Grounds include substantial risk of harm to self, others or others' property, threats plus a violent act within 10 years, or grave disability from failing to meet essential needs or severe deterioration.
  • Every ground checked needs a statement with specific examples, and extra pages can be attached.
  • The petitioner must state that the respondent was told they would lose firearm rights if involuntarily committed.
  • A 90-day LRA petition must name the agency, provider or facility that agrees to provide the less restrictive treatment.

Get the official form

Download the current version from the source each time; forms change without notice.

Petition for Involuntary Treatment or Less Restrictive Alternative Treatment

Fill it with Vero

If your copy of the form is a fillable PDF, upload it once and Vero Documents fills it from the visit note and the chart, ready for you to review and sign. Download, print, or email the finished form, with the patient’s consent.

How this list is checked

A form is listed only after its name and number were confirmed on the issuing agency’s or insurer’s own website, or in the form itself. Each entry links to that source. The list was last checked in October 2026. Forms and their requirements change without notice, so check the official page for the current version before you complete one.

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Frequently asked questions

Who signs the Washington MP 303 as an examiner?

Two examining professionals sign declarations under penalty of perjury that they examined the respondent and reviewed the petition. One is a physician, physician assistant or psychiatric ARNP; the other may also be an advanced RNP or a mental health or substance use disorder professional. Substance use petitions may be signed by a substance use disorder professional and an ARNP.

When does the MP 303 ask for a less restrictive alternative?

The petitioner states whether LRA treatment is or is not in the best interest of the respondent or others. If not, it must be because the person needs intensive, supervised 24-hour care or no sustainable less restrictive placement was found despite diligent efforts.