Validation of Payment
merchant doesn't want to have to be asked for further validation of payment on the Merchant Keypad accessory such as validating a signature
This is when a customer pays by using self service POS unit and after completing 1st transaction, proceed to purchase something else right away with same CC and while making payment system asks for verification required. Customer does not press yes, because system sais duplicate payment so they press No or just don't complete transaction.
Also is there an option to activate or deactivate apple pay?