Amazon is recording people's faces and saving the footage to identify them at a later date, in a move likely to concern privacy conscious users.
The site wants to use five-second snippets of video to record a person's face if they wish to become a seller on the online marketplace.
It may be able to use its facial recognition technology, called Rekognition, to identify users.
It is believed to be in a bid to crack down on fake sellers and counterfeit goods being peddled on the site.
The method was first spotted by a Vietnamese seller who revealed the programme requires users to open their webcam and record themselves before they become verified.
It is believed this will be used in future and compared to any subsequent login attempts.
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