Marriott International, Inc.

Marriott International, Inc. notified California AG on Nov 30, 2018 of a data breach, which occurred on Sep 10, 2018. Data exposed: Passport number, Financial / bank account, Date of birth, Usernames / passwords, Email address, Phone number, Postal address, Name.

All 3 filings by Marriott International, Inc., state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: Marriott International, Inc.
Source: California AG · source record
Date reported: Nov 30, 2018
Date(s) of breach: Monday, September 10, 2018
Residents affected: Not published by this source
Data exposed: Passport number Financial / bank account Date of birth Usernames / passwords Email address Phone number Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Sep 10, 2018, as stated in the letter
"The investigation has determined that there was unauthorized access to the database, which contained guest information relating to reservations at Starwood properties* on or before September 10, 2018."
Days to notice: 81 days from discovery (Sep 10, 2018) to the California record (Nov 30, 2018). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
First seen by BreachTally: 2026-10-30 16:14 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

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Other filings by Marriott International, Inc.

Organization	Source	State	Reported	Residents affected	Data exposed
Marriott International	California AG	CA	Oct 30, 2019	Not published	Social Security numberPostal addressName
Marriott International, Inc.	Oregon DOJ	OR	Nov 30, 2018	500,000,000	Not stated

Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.