Case file: Tandem Diabetes Care, Inc.
Every government filing on this incident, the dates as stated, and the days to notice against each state's statute. Built from the records on Nov 9, 2026, agency link on every row. Not legal advice.
The incident
- Breach window
- Jan 17, 2020 to Jan 20, 2020
- Discovered
- Jan 17, 2020, as stated in the California letter
- State and federal records
- 2 filings, Mar 17, 2020
- Residents counted
- No state publishes a resident count for this incident
- Everyone affected
- 140,838, as reported to Oregon DOJ on Mar 17, 2020
- Information exposed
- Social Security number, Email address
- Offered to those affected
- 12 months of credit or identity monitoring through Experian
- Third party named
- No
- Days to notice
- Past the statutory period in all 2 states that set one, counted from discovery to each state's first record
The letter: "On January 17, 2020, we learned than an unauthorized person gained access to a Tandem employee’s email account through a security incident commonly known as “phishing.” Once we learned about the incident, we immediately secured the accou..."
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| Oregon Oregon DOJ | Mar 17, 2020 | 140,838 (total) | 60 days, statute 45 days, over | Record | |
| California California AG | Mar 17, 2020 | Not published | 60 days, statute 30 days, over | Letter Record |
People is the count the filing gives, residents of the state unless marked total. Days to notice runs from the discovery date the letter states, or from the end of the breach window when no letter states one, to the date on the state's first record of the incident. "Over" marks a count past the days the state's statute allows for notice to residents. The statute's trigger is a question of fact, the days are arithmetic.
Notice timing, state by state
- 60 days from discovery (Jan 17, 2020) to the Oregon record (Mar 17, 2020). Statute: 45 days from discovery or notification of the breach (ORS 646A.604).
- 60 days from discovery (Jan 17, 2020) to the California record (Mar 17, 2020). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
The statutes
- Oregon: 45 days to notify residents from discovery or notification of the breach, ORS 646A.604. Attorney General when more than 250 Oregon residents are affected, with the consumer notice.
- California: 30 days to notify residents from discovery or notification of the breach, Cal. Civ. Code § 1798.82. Sample notice to the Attorney General when more than 500 Californians are notified, within 15 days of the consumer notice (effective 2026).
Sources and method
Records as published by Oregon DOJ, California AG. Letter facts (discovery date, monitoring, third party) are read from the consumer letter the agency posted, 1 letter read for this incident, and quoted so you can check them. Texas and HHS publish no letters. First-seen times on each record page. Spot an error? Email support@breachtally.com with this page link.