The boss called, with a German accent.

In March 2019, the CEO of a UK energy firm sent €220,000 to an account in Hungary on the phone instructions of the person he believed was the CEO of the German parent company. The voice had been imitated with AI; it became one of the first publicly reported voice-cloning frauds.

01The case
Date
March 2019 (made public in August–September 2019)
Where
United Kingdom and Germany
Target
The CEO of a UK energy firm
Method
Phone call in the AI-imitated voice of the parent company’s CEO
Amount
€220,000 (about US$243,000)

The caller was the CEO of the German parent company — or so it seemed. He asked for an urgent payment to a Hungarian supplier within the hour and said it would be reimbursed. The UK CEO recognised his boss's slight German accent and the melody of his voice, and sent the money.

The fraudsters called again, saying the reimbursement had been made, and asked for a second transfer. The reimbursement had not arrived, and the CEO refused. A third call came from an Austrian number and deepened his suspicion.

The money was moved from the Hungarian account to Mexico and elsewhere. Insurer Euler Hermes, which described the case to The Wall Street Journal, covered the full loss. According to the report, experts considered it the first cybercrime in which criminals clearly drew on AI.

02What we learn

A familiar accent was enough.

  • The CEO judged who was calling by accent and melody — both could be imitated. Today, a few minutes of recorded speech can be enough for a convincing imitation.
  • Urgency and the promise of reimbursement delayed any questioning of the payment.
  • What raised suspicion were inconsistencies: a reimbursement that never came and an unfamiliar number.

SynVoi analyses whether a familiar-sounding voice is cloned while the conversation is still going; the decision rests on traces in the voice itself, not on accent or melody.

03Sources

This post is compiled from the public news reports below; figures and dates are as reported in the sources. The image is illustrative.

  1. The Wall Street JournalFraudsters use AI to mimic CEO’s voice in unusual cybercrime case
  2. Trend MicroUnusual CEO Fraud via Deepfake Audio Steals US$243,000 From UK Company
  3. PaymentsJournalIt Happened! AI Deep Fake Mimicked a CEO’s Voice and Stole €220,000
04More news

All news

05Contact

Catch the cloned voice before the call ends.

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