Montana Title 72. Estates, Trusts, and Fiduciary Relationships § 72-2-522. Execution--witnessed wills--holographic wills

(1) Except as provided in 72-2-523, 72-2-526, 72-2-533, and subsection (2) of this section, a will must be:

(2) A will that does not comply with subsection (1) is valid as a holographic will, whether or not witnessed, if the signature and material portions of the document are in the testator's handwriting.

(3) Intent that the document constitute the testator's will may be established by extrinsic evidence, including, for holographic wills, portions of the document that are not in the testator's handwriting.