Mastercard tests facial recognition software in Brazil, letting users who opt in pay with a smile or a wave, using tech from NEC, Payface, PopID, and others Financial Times 2022-05-18 Siddharth Venkataramakrishnan Mastercard, NEC, Payface, Brazil Related Coverage With a smile or a wave, paying in store just got personal Mastercard USA Mastercard launches ‘smile to pay’ system amid privacy concerns The Guardian Mastercard Adds Biometric Payment Method in Brazil Coinspeaker Mastercard Rolls Out ‘Smile and Pay’ Biometric Option PYMNTS.com