Ontario's Mental Health Act sets out statutory forms that physicians complete for involuntary psychiatric assessment and admission, renewals, status changes, capacity certificates and community treatment orders. The most used are Form 1 (application for psychiatric assessment), Form 3 (involuntary admission), Form 4 (renewal), Form 21 (incapacity to manage property), Form 42 (notice of a Form 1) and Form 45 (community treatment order).
Physicians complete these forms: the examining physician signs Form 1, the attending physician signs Forms 3, 4 and 21, and the physician issuing or renewing a CTO signs Form 45. Other forms in the set, such as Form 2 and Form 50, are completed by others, including justices of the peace and rights advisers.
Download the current version from the source each time; forms change without notice.
Mental Health Act forms completed by physicians
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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 change without notice, so download the current version from the official page before you fill it in.
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In Ontario's Central Forms Repository, in English and French, as fillable PDFs and, for some forms, HTML versions. Each form has its own number, for example 6427-41 for Form 1 and 3760-41 for Form 45, and searching Mental Health Act in the repository lists the full set.
Form 3 requires the physician to give the patient a Form 30 notice and notify a rights adviser, and Form 21 requires a Form 33 notice and a rights adviser. Before a Form 45 community treatment order is issued, the person and any substitute decision-maker must receive rights advice.
Applications to the Consent and Capacity Board use Board forms such as Forms 16, 18 and 48, which are completed by the patient or someone on their behalf, not by the physician. Form 45 itself tells the person they may apply to the Board using Form 48.