DisclosureLens
UnknownGovernment IDFinancial accountMedium

BMO Bank N.A.

bd_102399c950a4b981 · schema v1 · pii pii-v2

Severity

Medium

Discovered

—

Filed

May 31, 2017

To disclose

—

Affected

126state residents only

Linked

5 filings

Confidence

95%
Full breach record for BMO Bank N.A. →4 incidents on file

BMO Harris Bank N.A. reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2017-05-31. 126 Massachusetts residents were affected. The report records the breach type as paper.

Incident timeline — partial

? — ?

Breach window unknown

May 31, 2017

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Filing propagation · 5 filings · 5 states

View merged incident ↗
Montana State AGMay 24 · first
Oregon State AG+7d
California State AG+7d
Washington State AG+7d
Massachusetts State AG+7d · this page

Pattern: first filing May 24 (MT), last May 31 (MA) — a 7-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.