processingInformation. amexIndirectModelType {#processing-info-amex-indirect-model-type}
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Type of transaction being processed.  
This field helps categorize transactions based on their purpose and flow. Include this field in authorization requests for an American Express card for a staged digital wallet.  
This field is available only on the `American Express Direct` and `Visa Platform Connect` processors.  
Possible values:

* `1`: Bill payment provider transaction
* `2`: Installment payment transaction
* `3`: Marketplace transaction
* `4`: Peer-to-peer transaction
* `5`: Staged back-to-back transaction
* `6`: Stored value transaction

Specifications {#processing-info-amex-indirect-model-type_Specifications}
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* **Data Type:** String
* **Data Length:** 2

Mapping Information {#processing-info-amex-indirect-model-type_Mapping}
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* **REST API Field:** processingInformation.amexIndirectModelType
* **Simple Order API Field:** indirect_modelType