John D. Williamson, Certified Public Accountant

John D. Williamson, Certified Public Accountant notified California AG on Feb 27, 2017 of a data breach, which occurred on Feb 9, 2017. Data exposed: Social Security number, Financial / bank account, Medical / health information, Health insurance, Date of birth, Postal address, Name.

Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: John D. Williamson, Certified Public Accountant
Source: California AG · source record
Date reported: Feb 27, 2017
Date(s) of breach: Thursday, February 9, 2017
Residents affected: Not published by this source
Data exposed: Social Security number Financial / bank account Medical / health information Health insurance Date of birth Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Feb 10, 2017, as stated in the letter
"On the morning of February 10, 2017 I discovered that my car had been stolen sometime between the night of February 9, 2017 and that morning."
Days to notice: 17 days from discovery (Feb 10, 2017) to the California record (Feb 27, 2017). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
Offered in the letter: 24 months of credit or identity monitoring through Experian
First seen by BreachTally: 2026-10-30 16:18 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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Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.