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Check Enrollment Response Fields and Their Equivalent Authorization Request Fields {#pa2-ccdc-combining-mapping-check-enroll-auth-fields}
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When a customer is authenticated without a challenge, the transaction can be authorized either in the same request or in a separate authorization request. Whether authorization occurs in the same request or a separate request, the values from the check enrollment response must be passed to the authorization request to qualify for a liability shift. This table matches the check enrollment fields with their equivalent authorization fields. Sometimes a check enrollment response field is the same field used in the authorization request.  
Be sure to include the following card-specific information in your authorization request:

* For Visa, JCB, China UnionPay, Elo,Diners Club, Discover, and American Express include the *CAVV*.
* For Mastercard only, include the collection indicator and the *AAV* (also known as *UCAF*).

{#pa2-ccdc-combining-mapping-check-enroll-auth-fields_ul_hyb_lvz_pyb}

| Identifier                                                               | Enrollment Check Response Field                    | Card Authorization Request Field            |
|:-------------------------------------------------------------------------|:---------------------------------------------------|:--------------------------------------------|
| E-commerce indicator                                                     | payerAuthEnrollReply_commerceIndicator             | ccAuthService_commerceIndicator             |
| Collection indicator                                                     | payerAuthEnrollReply_ucaf CollectionIndicator      | ucaf_collectionIndicator                    |
| CAVV                                                                     | payerAuthValidateReply_cavv                        | ccAuthService_cavv                          |
| AAV                                                                      | payerAuthValidateReply_ucafAuthenticationData      | ucaf_authenticationData                     |
| XID                                                                      | payerAuthEnrollReply_xid                           | ccAuthService_xid                           |
| Result of the enrollment check for Asia, Middle East, and Africa Gateway | payerAuthEnrollReply_veresEnrolled                 |                                             |
| `3-D Secure` version                                                     | payerAuthEnrollReply_specificationVersion          | ccAuthService_paSpecificationVersion        |
| Directory server transaction ID                                          | payerAuthEnrollReply_direc toryServerTransactionID | ccAuthService_directorySer verTransactionID |
[Enrollment Check and Response Fields]

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