HackingFinancial ServicesFinanceSupply Chain (3P Vendor)Customer Data InvolvedPIIIdentity (basic)LowContained

Westamerica Bank

bd_de455dadd7e6ee0a · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Jul 17, 2023

To disclose

—

Affected

Not disclosed

Confidence

65%

Full breach record for Westamerica Bank →

Westamerica Bank notified customers of a potential compromise of personal information at a third-party processing vendor. The incident occurred between May 27 and May 31, 2023. The bank launched a review and is offering 12 months of complimentary credit monitoring and identity restoration services through Experian. No misuse of information has been indicated at this time.

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Incident timeline

May 27, 2023

Begins

Jul 17, 2023

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Westamerica Bank
norm: westamerica bank

Name: Westamerica Bank
norm: westamerica bank
Industry: Financial Servicesllm

Discovered: —
Breach occurred: May 27, 2023 – May 31, 2023
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
Threat actor: External
Initial access: supply_chain

During the incident: Immediately launched a review to determine who may have been affected by this incident
Continually reviews our third-party relationships, including the vendor responsible for this incident
Closely monitor your account activity at Westamerica Bank
Offering a complimentary 12-month membership of Experian’s IdentityWorks
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-570427
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 17, 2023
Raw hash: d35f157abf6305917e37852d4966879fca0f9c9a00fc95800503c3c113e8855d

Reporting entityWestamerica Bank

Victim entityWestamerica Bank

IncidentThird-Party / Supply Chain

Stated responseImmediately launched a review to determine who may have been affected by this incident

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov