According to the lawsuit, the city claims Equifax violated its consumer fraud ordinance and state laws by failing to protect sensitive data and not alerting the public quick enough.
Officials estimate 5.4 million Illinoisans were among the 143 million consumers affected by the breach, which the company discovered July 29 and notified consumers of Sept. 8. However, the city doesn’t yet know how many affected consumers are Chicago residents.
A number of other lawsuits against Equifax have been filed throughout the U.S., including one in the city of San Francisco and another in Massachusetts, according to The Chicago Tribune.
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Equifax CEO resigns after massive breach: 5 things to know
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