Wells Fargo Bank Data Breach (2017)

When a lawyer for Gary Sinderbrand, a former Wells Fargo employee, subpoenaed the bank as part of a defamation lawsuit against a bank employee, he and Mr. Sinderbrand expected to receive a selection of emails and documents related to the case. But what landed in Mr. Sinderbrand’s hands on July 8 went far beyond what his lawyer had asked for: Wells Fargo had turned over — by accident, according to the bank’s lawyer — a vast trove of confidential information about tens of thousands of the bank’s wealthiest clients.