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Interpreting the Response {#concept_eyw_mff_xpb}
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In EMV 3-D Secure, there are two possible responses:

* Frictionless: No challenge or stepup to the cardholder. While frictionless authentication can indicate a successfully authenticated outcome because the customer's card is enrolled in a payer authentication program, it can also result from the bank failing or rejecting authentication without challenging the cardholder. In the frictionless authentication flow, you receive a PAResStatus of either `Y`, `A`, `N`, `I`, `R`, or `U` with an associated ECI value. With successful frictionless authentication, the PAResStatus = `Y` or `A` and you receive a CAVV. You may also receive a PAResStatus = `I` indicating successful authentication, but it might not include a CAVV.
* Challenge: The response contains PAResStatus = `C`. A challenge response has a payload and contains an ACS URL and a step up URL. Challenge the cardholder to provide additional authentication information and display an authentication challenge window to the cardholder so the cardholder can respond to a validation request and receive a validation response.

