PaymentsOS determines which terminal to use according to the body of the Authorization/Charge request.
- If the request does contain a CVV value, then the system will direct the payment through the terminal that requires CVV (7153xxx).
- If the request does not contain a CVV value, then the system will direct the payment through the terminal that does not require CVV (7152xxx).
Refund request is an exception due to the fact that even if the original payment (capture/charge) was sent through the CVV mandatory terminal, there is no need to resend the CVV for the refund request. Although the refund will go through the CVVmandatory terminal, we have enough transaction identifiers with SHVA to allow this Refund request to be approved without resending the CVV number.