Massachusetts data breach notifications

Persons holding personal information about Massachusetts residents must notify the Office of Consumer Affairs and Business Regulation and the Attorney General following discovery of a breach.

Statute

M.G.L. c. 93H

Authoritative source

https://www.mass.gov/lists/data-breach-reports

How DisclosureFeed indexes Massachusetts filings

Massachusetts is scheduled for ingestion in Weeks 13-18 of the build (Tier-2 state AG sources). Subscribe to the main feed in the meantime — historical Massachusetts filings will backfill on launch.

Methodology & AI-assisted output disclosure

Extraction is performed by Claude Sonnet 4.6 with Instructor + Pydantic validation; outputs carry per-field source-span citations and per-field confidence scores. Per EU AI Act Article 50 (in force August 2, 2026), every record is labeled ai_assisted: true. See the full Sources & Methodology page.

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