BreachCensus

American Cancer Society, Inc.

United States of America

American Cancer Society, Inc. is an organisation in Massachusetts. It appears on the Massachusetts Attorney General breach-notification register and the California Attorney General breach-notification register with 3 confirmed incidents (4 filings); the most recent notice was filed on June 6, 2023.

Data as of August 31, 2026.

Confirmed incident

US-MA

Disclosed
June 6, 2023

Timeline

  1. June 6, 2023
    Reported to regulator Regulator

    MA AG breach notification: 1 Massachusetts residents affected

    source
What a Massachusetts notice means

Required under M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗

Confirmed incident

US-MA

Disclosed
February 3, 2022

Timeline

  1. February 3, 2022
    Reported to regulator Regulator

    MA AG breach notification: 2 Massachusetts residents affected

    source
Confirmed incident

Filed in CA and MA

The same incident was filed separately with 2 jurisdictions within a few days of each other (CA and MA) — shown here as one incident.

Occurred
January 8, 2019
Disclosed
March 1, 2019

Timeline

  1. March 1, 2019
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
  2. March 1, 2019
    Reported to regulator Regulator

    MA AG breach notification: 263 Massachusetts residents affected

    source
What a California notice means

Required under Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗