From the point of view of the American financial service provider Mastercard, the annoying rummaging around for the wallet at the checkout should no longer exist in the future.
In five St. Marche supermarkets in the metropolis of São Paulo in Brazil, the company is starting a pilot program for a biometric "check-out" - i.e. payment process.
According to Mastercard, customers can pay contactlessly using face recognition or a wave in retail.
If you want to use the biometric payment method, you must have previously registered in the retailer's app or the identity checker's app and enter your biometric data there.
Users can then pay at the checkout by looking into the camera - similar to how Apple's Face ID is used to unlock iPhones - or by moving their hand in a reader.
The US group Mastercard is working with the Brazilian financial start-up Payface, which developed the app for supermarkets.
"We're targeting the Middle East and Africa, Asia and Latin America," Nili Klenoff, senior vice president of product innovation at Mastercard, said in an interview.
We really look forward to rolling out this solution everywhere.
Other functions that use this technology are also in the works.
It is still unclear when exactly the payment method will be launched in other countries.