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Crédit Agricole's 'Test Cédric' Notification Sent by Error Locks Out Customers

A mistaken mass alert caused a traffic surge that temporarily blocked access to the bank’s app and exposed weaknesses in its testing controls for millions of users.

Overview

  • The bank accidentally pushed an internal test labelled “Test Cédric” to its full retail user base, an event that reached customers on Tuesday.
  • The unexpected mass alert drove a sharp influx of logins and reports on outage trackers with Down Detector showing more than 10,000 problem reports around 16:30.
  • Clicking the notification brought users to a “Travaux en cours” maintenance page and many customers were unable to access accounts through the Ma Banque app or website.
  • Crédit Agricole apologised, said its information systems were not compromised, and mobilised teams to restore service with reports saying access returned roughly an hour later.
  • The incident has raised reputational and operational questions for the bank that serves roughly 27 million individual clients and drawn heavy attention on social media.