Required Fields for Mass Transit Reversals {#mt-reversal-fields-matrix}
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This table provides information about the fields required for mass transit reversals.

| REST API Field                                                     |                                             Authorization Reversal                                              |                                                Timeout Reversal                                                 | Information/Value                                                                                                                                                                                            |
|:-------------------------------------------------------------------|:---------------------------------------------------------------------------------------------------------------:|:---------------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| clientReferenceInformation. comments                               | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) | For this value, see [Mass Transit Transaction Types](/docs/vas/en-us/urban-mobility/developer/ctv/rest/mass-transit/um-processing-emv-vpc/um-processing-trxn-types.md ""). |
| clientReferenceInformation. partner. thirdPartyCertificationNumber | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) | `Visa Acceptance Solutions` provides the value for this field.                                                                                                                                               |
| clientReferenceInformation. transactionId                          | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) |                                                       ---                                                       | ---                                                                                                                                                                                                          |
| orderInformation. amountDetails.currency                           | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) |                                                       ---                                                       | ---                                                                                                                                                                                                          |
| orderInformation. amountDetails. totalAmount                       | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) | ---                                                                                                                                                                                                          |
| reversalInformation. reason                                        |                                                       ---                                                       | ![](/content/dam/documentation/cybs/en-us/common/images/circlecheck-filled.svg/jcr:content/renditions/original) | ---                                                                                                                                                                                                          |
[Required Fields for Mass Transit Reversals]