customerInformation. merchantCustomerId {#customer-info-merchant-customer-id}
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Your identifier for the customer, which is also known as the customer ID.  
Some processors have a maximum length restriction of 30.

Specifications {#customer-info-merchant-customer-id_Specifications}
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* **Data Type:** String
* **Data Length:** 100

Mapping {#customer-info-merchant-customer-id_Mapping}
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* **REST Field Name:** customerInformation.merchantCustomerId
* **Simple Order Field Name:** No corresponding field.