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Journey History Service {#um-intro-journ-hist}
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Card schemes might require transit operators to provide cardholders with a journey history service that enables the cardholder to view their journey history and receipt information. Refer to card scheme documentation for more information about each card scheme's requirements for journey history.

Payment Account Reference
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`Cybersource` supports the use of the payment account reference (PAR) by providing the PAR value in authorization responses when a PAR is available from the card issuer. The PAR response field is processorInformation.paymentAccountReferenceNumber. Using the PAR enables you to track card accounts when digital devices, such as smart phones and smart watches, have a network token or DPAN that the card issuer provided to the device. You can use the PAR to provide journey history to cardholders and to match the card account FPAN and DPAN values.

Merchant Descriptor
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You can use the merchant descriptor feature to produce a transaction-specific reference that cardholders can see on their card account statement. To use the merchant descriptor feature, include the merchantInformation.merchantDescriptor.name field in your authorization, credit, and capture requests. The value for the field must consist solely of English characters. Before implementing transit journey history functionality, confirm with your acquirer and card schemes that the PAR and merchant descriptor features are supported.  
For documentation regarding `Cybersource` card-not-present services that you can use to support a transit system journey history service, see the [*Payments Developer Guide*](https://developer.cybersource.com/docs/cybs/en-us/payments/developer/ctv/rest/payments/payments-intro.md "").  
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