If you use an EMV card in transit, then the Visa/MC rules say that the same card must be used to pay for the fare. Transit providers are not allowed to use the

If you use an EMV card in transit, then the Visa/MC rules say that the same card must be used to pay for the fare. Transit providers are not allowed to use the EMV card purely as "identification". I answered elsewhere on the thread about how the transit provider is able to use the EMV as an identifier after it has been used for payment, with a one way hash sent to the transit provider.