What happens if there’s a sweaty, dirty or greasy fingerprint? Is there a second presentment or option for Cardholder Verification Method [CVM]? Or is the transaction just declined?
Mastercard is setting up performance requirements and a testing framework which will work for different climates and environmental conditions. However, there are some technical limitations. If someone has a very greasy finger, the biometrics may not work and instead the card will fall back to a secondary CVM such as PIN or signature, set by the bank.