Required Fields for a Time-Out Authorization Reversal {#um-processing-timeout-rev-reqd-fields}
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[clientReferenceInformation.comments](https://developer.cybersource.com/docs/cybs/en-us/api-fields/reference/all/rest/api-fields/client-ref-info-aa/client-ref-info-comments.md "")
:
Set this field to `REVERSAL Timeout`.

[clientReferenceInformation.transactionId](https://developer.cybersource.com/docs/cybs/en-us/api-fields/reference/all/rest/api-fields/client-ref-info-aa/client-ref-info-transaction-id.md "")
:

[reversalInformation.amountDetails.totalAmount](https://developer.cybersource.com/docs/cybs/en-us/api-fields/reference/all/rest/api-fields/reversal-info-aa/reversal-info-amount-details-total-amount.md "")
:

[reversalInformation.reason](https://developer.cybersource.com/docs/cybs/en-us/api-fields/reference/all/rest/api-fields/reversal-info-aa/reversal-info-amount-details-total-amount.md "")
: