18-C M.R.S. § 2-502

1. Witnessed wills. Except as otherwise provided in subsection 2 and in sections 2‑505 and 2‑512 , a will must be: A. In writing; [PL 2017, c. 402, Pt. A, §2 (NEW); PL 2019, c. 417, Pt. B, §14 (AFF).] B. Signed by the testator or in the testator's name by some other individual in the testator's conscious presence and by the testator's direction; and [PL 2017, c. 402, Pt. A, §2 (NEW); PL 2019, c. 417, Pt. B, §14 (AFF).] C. Signed by at least 2 individuals, each of whom signed within a reasonable time after the individual witnessed either the signing of the will as described in paragraph B or the testator's acknowledgment of that signature or acknowledgment of the will. [PL 2017, c. 402, Pt. A, §2 (NEW); PL 2019, c. 417, Pt. B, §14 (AFF).] [PL 2017, c. 402, Pt. A, §2 (NEW); PL 2019, c. 417, Pt. B, §14 (AFF).]

2. Holographic wills. 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. [PL 2017, c. 402, Pt. A, §2 (NEW); PL 2019, c. 417, Pt. B, §14 (AFF).]

3. Extrinsic evidence. Intent that a 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. [PL 2017, c. 402, Pt. A, §2 (NEW); PL 2019, c. 417, Pt. B, §14 (AFF).]