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payerAuthEnrollService_defaultCard {#payer-auth-enroll-service-default-card}
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Indicates that the card being used is the one designated as the primary payment card for purchase.  
This field can contain one of these values:

* `true`
* `false`  
  Recommended for Discover ProtectBuy.

Specifications {#payer-auth-enroll-service-default-card_d85e38}
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* **Data Type:** Boolean
* **Data Length:** 1

Mapping Information {#payer-auth-enroll-service-default-card_d85e57}
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* **REST API Field:** consumerAuthenticationInformation. defaultCard
* **SCMP API Field:** pa_default_card
* **Simple Order API Field:** payerAuthEnrollService_defaultCard