BMO Bank N.A.
bd_86c1b9b8c7c017be · schema v1 · pii pii-v1
Full breach record for BMO Bank N.A. →4 incidents on fileBMO Harris Bank N.A. notified customers of a misdelivery error during the production of 2016 IRS Form 5498. Some customers received their own form along with another customer's form, while others did not receive their form. The exposed data included name, address, last four digits of SSN, account number, IRA contributions, and Fair Market Value. The bank is mailing replacement forms and offering 12 months of credit monitoring.
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Incident timeline
May 15, 2017
Begins
May 31, 2017
Filed
Linked disclosures
Why this link?Regulatory filings (4) · sorted by filing gap
- Massachusetts State AGbd_102399c950a4b9812017-05-31Verified
- Oregon State AGbd_5a4bffd812ee17542017-05-31Verified
- Washington State AGbd_d7675678ff52dc612017-05-31Verified
- Montana State AGbd_2b6871049af961ad2017-05-24 · +7dCandidate
Filing propagation · 5 filings · 5 states
View merged incident ↗Pattern: first filing May 24 (MT), last May 31 (CA) — a 7-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.