clientReferenceInformation. code {#client-ref-info-code}
========================================================

Order reference or tracking number.  
Provide a unique value for each transaction so that you can perform meaningful searches for the transaction. Refer to the *Getting Started with `Cybersource` Advanced* guide.

> IMPORTANT
> Depending on the values in your ` Cybersource ` account, there might be a requirement for this field's value to be unique within a 15-minute period. Contact customer support to find out whether this requirement applies to your ` Cybersource ` account.

PIN Debit Transactions
:
Requests for PIN debit reversals must include the same merchant reference number that was used in the transaction that is being reversed.

`FDC Nashville Global`
:
During card-not-present transactions, certain circumstances can cause the processor to truncate this value to 15 or 17 characters for Level II and Level III processing, which can cause a discrepancy between the value you submit and the value included in some processor reports.

`FDC Nashville Global`
:
During card-present transactions, when you do not send a valid value, one is created for you. However, the value is not returned, so you cannot use it to track the order.

`SIX`
:
When a card-present request does not include a merchant reference number, this value is provided by the client software that is installed on the POS terminal.

Specifications {#client-ref-info-code_Specifications}
-----------------------------------------------------

* **Data Type:** String
* **Data Length:** 50
* **Data Length** :
  * **`China UnionPay` Data Length:** 40
  * **`Elavon Americas` Data Length:** 39
  * **`FDC Nashville Global` Data Length:** 8
  * **`RuPay` Data Length:** 24 (Credit Services)
  * **`RuPay` Data Length:** 50 (Other services)
  * **All Other Processor's Data Length:** 8

Mapping Information {#client-ref-info-code_Mapping}
---------------------------------------------------

* **REST API Field:** clientReferenceInformation.code
* **SCMP API Field:** merchant_ref_number
* **Simple Order API Field:** merchantReferenceCode