Mass. Gen. Laws ch. 190B § 1-109 : REAL AND PERSONAL PROPERTY AND DOMESTIC RELATIONS — DESCENT AND DISTRIBUTION, WILLS, ESTATES OF DECEASED PERSONS AND ABSENTEES, GUARDIANSHIP, CONSERVATORSHIP AND TRUSTS — MASSACHUSETTS UNIFORM PROBATE CODE — GENERAL PROVISIONS, DEFINITIONS AND PROBATE JURISDICTION OF COURT — SHORT TITLE, CONSTRUCTION, GENERAL PROVISIONS —109 - Standard of proof
In contested cases, the standard of proof is a preponderance of the evidence.