The originalTransactionId of CONSUMPTION_REQUEST notification is empty

Now we got a CONSUMPTION_REQUEST notification_type and the content is

{Environment:PROD 
 NotificationType:CONSUMPTION_REQUEST 
 Password:xxxx0b91b407f5xxxxxxxxx 
 ExpirationIntent: 
 AutoRenewAdamID: 
 AutoRenewStatus: 
 AutoRenewProductID:
 AutoRenewStatusChangeDate:{AutoRenewStatusChangeDate: AutoRenewStatusChangeDateMS: AutoRenewStatusChangeDatePST:} 
 BID:com.boundle.id
 BVRS:89 
 UnifiedReceipt:{
 	Status:0 
 	Environment:Production 
 	LatestReceipt:MIISegYJKoZIhvcNXXXXXXXXXX 
 LatestReceiptInfo:[] 
 PendingRenewalInfo:[]
 }
}

It seems there is no receipt transaction id which the customer asks for a refund.

And then we try to get the receipt details through https://buy.itunes.apple.com/verifyReceipt with LatestReceipt of notification

{ receipt:
   { receipt_type: 'Production',
     adam_id: 125258871623,
     app_item_id: 125258871623,
     bundle_id: 'com.boundle.id',
     application_version: '89',
     download_id: null,
     version_external_identifier: 843111111,
     receipt_creation_date: '2021-07-18 04:48:20 Etc/GMT',
     receipt_creation_date_ms: '1626583700000',
     receipt_creation_date_pst: '2021-07-17 21:48:20 America/Los_Angeles',
     request_date: '2021-07-20 08:02:21 Etc/GMT',
     request_date_ms: '1626768141824',
     request_date_pst: '2021-07-20 01:02:21 America/Los_Angeles',
     original_purchase_date: '2021-07-07 00:03:57 Etc/GMT',
     original_purchase_date_ms: '1625616237000',
     original_purchase_date_pst: '2021-07-06 17:03:57 America/Los_Angeles',
     original_application_version: '87',
     in_app: [] },
  environment: 'Production',
  status: 0 }
{ receipt_type: 'Production',
  adam_id: 125258871623,
  app_item_id: 125258871623,
  bundle_id: 'com.boundle.id',
  application_version: '89',
  download_id: null,
  version_external_identifier: 843111111,
  receipt_creation_date: '2021-07-18 04:48:20 Etc/GMT',
  receipt_creation_date_ms: '1626583700000',
  receipt_creation_date_pst: '2021-07-17 21:48:20 America/Los_Angeles',
  request_date: '2021-07-20 08:02:21 Etc/GMT',
  request_date_ms: '1626768141824',
  request_date_pst: '2021-07-20 01:02:21 America/Los_Angeles',
  original_purchase_date: '2021-07-07 00:03:57 Etc/GMT',
  original_purchase_date_ms: '1625616237000',
  original_purchase_date_pst: '2021-07-06 17:03:57 America/Los_Angeles',
  original_application_version: '87',
  in_app: [] }

There is no refund receipt info either.

Per doc, once received CONSUMPTION_REQUEST, we should send Consumption Information through API

PUT https://api.storekit.itunes.apple.com/inApps/v1/transactions/consumption/{originalTransactionId}

How could we get the originalTransactionId from notification?