stepUpOption. id {#step-up-opt-id}
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The unique identifier for this method. A follow-on step-up request provides the identifier. The wallet provider must send this value "as is" to follow-on step-up related APIs.

Specifications {#step-up-opt-id_Specifications}
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* **Data Type:** String
* **Data Length:** 96

Mapping Information {#step-up-opt-id_Mapping}
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* **REST API Field:** stepUpOption.id
* **Simple Order API Field:** No corresponding field.