Discovery variance · Leak precedence · Materiality delta · SEC filing delay · Filing span — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
State AGConfirmedLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedlow sensitivity
Affected (total reported)
—
Data types
1
PII
Jurisdictions
1
CA
Linked filings
1
all State AG
Timeline
Earliest sighting first · deep chronology in Litigation Timeline
Breach window
May 27, 2023 → May 31, 2023
When the intrusion reportedly occurred, per the linked filings
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.
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.