A friend's face on a video call: the Baotou face swap fraud

In April 2023 a businessman in Baotou, in China's Inner Mongolia region, took a video call from a close friend. The friend needed to place a deposit during a bidding process and asked for help. Seeing his friend on screen, the man transferred 4.3 million yuan, about $622,000. He found out only when he mentioned it to the real friend, who knew nothing about it.

Baotou police said the fraudster had used AI face swapping to take on the friend's face during the call. They stopped most of the money before it left and were still tracing the rest when the case was reported in May 2023. It set off a wide public debate in China about AI driven fraud, and followed new rules adopted that January to protect victims of deep synthesis.

The large corporate cases get the attention, but this is the version that scales. It needed no company, no lawyer and no paperwork, only a face, a relationship and a reason. A video call has become the way people check that a request is real, and a face swap turns that check into the attack.

• —Face swaps hold up in a single frame and slip across frames: at the jawline, around the eyes, when the head turns or a hand crosses the face.
• —Video KYC and remote onboarding rely on the same check this victim did, a face on a screen, and are attacked with the same tools.
• —A detector scores the frames and the voice together, so a convincing face paired with a borrowed voice still stands out.