Sainsbury's Halts AI Camera Use After Customer Misidentification

Sainsbury's has suspended the use of live facial recognition technology at one of its stores following an incident where a customer was mistakenly identified as a shoplifter. The technology was halted at the East Dulwich, south-east London branch after Matt Arnold, 46, was stopped by managers at a self-service checkout.

Arnold was purchasing items for a comedy event and had scanned his goods along with his Nectar loyalty card when he called for an attendant to approve an alcohol purchase. Subsequently, two managers approached him and escorted him from the store. Arnold, a comedy promoter, described the experience as a "terrifying glimpse of the future" and warned of the potential for customer humiliation.

"The staff said I'd been identified by the AI, and the cameras had flagged me," Arnold told the BBC. He noted that his extensive shopping, the act of scanning items, and the use of his Nectar card were inconsistent with typical shoplifting behavior.

Arnold reported seeing an overhead CCTV monitor displaying an alert with a red circle around his face as he was being removed from the store on August 6. Sainsbury's head office contacted him the following day to apologize, stating the incident was due to "human error" rather than a software malfunction.

This is not the first time Sainsbury's has faced issues with its AI identification system. In January, Warren Rajah, from Elephant and Castle, was approached by staff, asked to leave, and had his shopping taken. It was later discovered that the AI had mistaken him for another individual previously registered as an offender who was present in the store at the same time. Sainsbury's and Facewatch, the software provider, attributed that incident to "human error" as well.

Facewatch technology has been involved in similar misidentification cases at other retailers, including a Home Bargains store in 2024 and a B&M in Cardiff last year.

Arnold suggested that staff might be struggling to operate the system effectively in busy environments. "Mistakes are going to happen. They're not being equipped to implement the AI properly," he said.

A Sainsbury's spokesman confirmed that the technology's use has been paused at the Dulwich store pending an investigation. However, the company defended its broader rollout of the technology, citing an increase in violence against retail workers. The spokesman added, "Customers can be reassured that the Facewatch system has a 99.98 per cent accuracy rate, and every match is reviewed by a trained manager."