The etail giant is trialling its palm-scanning payment technology, known as Amazon One, at four Whole Foods stores close to its headquarters in Seattle.  

Shoppers can register their palms with Amazon, which creates a “signature” based on lines, creases, veins, bones and soft tissue in the user’s palm. Consumers can then link their “signature” to their credit and debit cards to make payments.

Customers simply wave their hands over an in-store device, similar to contactless card payments.