Issuing a new invoice after rebate must be a better process
When an invoice is rebated the rebated items are not easy available for re-billing.
Often we need to rebate due to "wrong customer". Then after rebate, the items are not available in an easy way, it is not easy to get the original postings back.
And if the hotel forgets to issue a new invoice, the "cost" is gone from "to be resolved". It must be an easier way to follow up the rebated items. It is not always the case that a rebated item is not supposed to be re-billed.