One linked filing — more sources may join as they report · filed Nov 2, 2012. View entity profile → Other incidents for this victim →
incident inc_3e421e08d6ed4fcb · merge_method deterministic
Not recorded for this incident
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.
PII · Financial account
CA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Barnes & Noble Booksellers, Inc. experienced criminal tampering with 63 PIN pad devices across its US retail stores. American Express, the card issuer, notified affected cardholders that names, account numbers, and expiration dates may have been accessed. The incident was contained by September 14, 2012, when all affected devices were powered down. No Social Security numbers were impacted.
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.