Mass. Gen. Laws ch. 190B, § 3-405: Formal testacy proceedings; uncontested cases; hearings and proof

Section 3–405. [Formal Testacy Proceedings; Uncontested Cases; Hearings and Proof.]

If evidence concerning execution of the will is necessary, the affidavit or testimony of 1 of any attesting witnesses to the instrument is sufficient. If the affidavit or testimony of an attesting witness is not available, execution of the will may be proved by other evidence or affidavit.