Clustered 6 filings across 1 jurisdiction · filing window Jan 11, 2013 → May 13, 2013. View entity profile → Other incidents for this victim →
incident inc_8b18b525a96c4333 · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay — 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
Sep 1, 2012
When the intrusion reportedly occurred, per the linked filings
Dec 5, 2012
Reported by CALIFORNIA AG filing
American Express notified cardholders that a merchant where they used their cards experienced unauthorized access to data files on September 1, 2012. Affected data included card account numbers, names, and expiration dates. Social Security numbers were not impacted. American Express placed additional fraud monitoring on affected accounts.
American Express Travel Related Services Company, Inc. reported a data breach affecting cardholders. Unauthorized access to a merchant's website files resulted in the exposure of card account numbers, names, and expiration dates. Social Security numbers were not impacted. The breach date was August 24, 2012, and the notification was filed with the California AG on December 5, 2012.
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.
American Express notified customers that a merchant, Tennis Express, detected unauthorized access to its website files on December 19, 2012. The breach exposed American Express card account numbers, names, and expiration dates. Social Security numbers were not impacted. American Express placed additional fraud monitoring on affected cards and offered identity theft assistance.
American Express notified cardholders that a merchant where they used their card detected unauthorized access to its data files. The affected data included American Express Card account numbers, names, and expiration dates. Social Security numbers were not impacted. American Express placed additional fraud monitoring on affected cards and offered identity theft assistance.
American Express notified customers that their card account numbers, names, and expiration dates were recovered during a law enforcement and/or American Express investigation. The company stated that Social Security numbers were not impacted and no unauthorized activity was detected. Additional fraud monitoring was placed on affected cards.
American Express notified customers that a merchant where they used their cards detected unauthorized access to website files on June 3, 2012. Affected data included card account numbers, names, and expiration dates. Social Security numbers were not impacted. American Express placed additional fraud monitoring on affected cards and offered identity theft assistance.