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Washington MP 301: Non-Emergency Initial Detention

A Washington designated crisis responder (DCR) files the MP 301 to ask the superior court for a non-emergency order of initial detention of an adult with a mental disorder, substance use disorder or both. The DCR uses it when the respondent has refused or failed to accept evaluation and treatment voluntarily. If granted, the court orders the person to appear at a facility within 24 hours for up to 120 hours of evaluation and treatment.

Who completes it

A designated crisis responder from a county, or from the Health Care Authority in consultation with a tribe, completes and signs the petition and the proof of service. Witnesses may add an optional declaration, and the judge or commissioner signs the order.

Submitting and payment

How to submit it
The DCR files the petition with the superior court, which issues the order for initial detention; the DCR then personally serves the respondent with the petition, order to appear and notice of rights.

Good to know

  • The petition must state facts showing a behavioral health disorder, likelihood of serious harm or grave disability, why no less restrictive alternative is appropriate, and the refusal of voluntary treatment.
  • The notice of rights promises a probable cause hearing within 120 hours, excluding weekends and holidays, and an examination by a physician and mental health professional within 24 hours of admission.
  • If the respondent does not appear as ordered, the DCR may have them taken into custody and delivered to an evaluation and treatment facility.
  • An optional demographic page asks about tribal affiliation, Indian health care provider involvement, relatives, substance use history, witnesses and current providers.

Get the official form

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

Petition for Initial Detention DCR (Non-Emergency) (Adults Only)

Official pagePDF

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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 files the Washington MP 301?

A designated crisis responder (DCR) from a county, or from the Health Care Authority in consultation with a tribe. The DCR bases the petition on personal observation, information from reliable people, investigation or an interview, and signs it under penalty of perjury under Washington law.

What is the difference between MP 301 and MP 302?

MP 301 is the non-emergency petition for adults only: the court orders the person to appear for evaluation within 24 hours of service. MP 302 is the emergency petition for adults and adolescents who present an imminent likelihood of serious harm or imminent danger from grave disability and are already in emergency custody.