Lockbox and QuickCash Receipt batches

The user who processes lockbox keeps track of the sequential receipt batches.  If she makes an error on bringing in the lockbox (transmission name has logic and can be mis-typed),  she will import the lockbox again with the correct transmission name.  When she submits validation for the second transmission, it will indicate that duplicates exist.  In order to process the second, correct transmission, she must delete the receipt batches created during the first lockbox processing.
At what point are receipt batches created?  Is there any easier way for the user to correct her transmission name than deleting the incorrect transmission and re-processing the lockbox?