payerAuthEnrollReply_ucafAuthenticationData {#payer-auth-enroll-reply-ucaf-authentication-data}
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Universal cardholder authentication field (UCAF) data.  
This field is available only on the `FDC Compass` and `Visa Platform Connect` processors.
Mastercard has indicated that an issuing bank can downgrade an authorization request to a non-secure transaction when the UCAF collection indicator is ` 1 ` and UCAF authentication data is not present. An issuing bank can choose not to settle a downgraded Mastercard Identity Check transaction. When UCAF authentication data is not present, set the UCAF collection indicator to ` 0 `.  
The value for this field corresponds to the following data in the TC 33 capture file:

* Record: CP01 TCR8
* Position: 126-157
* Field: Mastercard UCAF Data

Specifications {#payer-auth-enroll-reply-ucaf-authentication-data_d28e54}
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* **Data Type:** String
* **Data Length (request):** 32
* **Data Length (response):** 255

Mapping Information {#payer-auth-enroll-reply-ucaf-authentication-data_d28e78}
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* **REST API Field:** consumerAuthenticationInformation.ucafAuthenticationData
* **SCMP API Fields:**
  * pa_enroll_ucaf_authentication_data
  * pa_validate_ucaf_authentication_data
  * ucaf_authentication_data
* **Simple Order API Fields:**
  * payerAuthEnrollReply_ucafAuthenticationData
  * payerAuthValidateReply_ucafAuthenticationData
* ucaf_authenticationData