The error message "Rebate bill can contain only rebated items" that appears when trying to close a rebated bill, is related to the fiscal requirements in Italy.
Fiscal printers in Italy don't accept items to balance out rebated items. rebated items can only be closed against payments/refunds.
To close the bill with rebates in the Italian legal environment, follow these steps:
Create two separate bills:
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- One bill should have the rebated item and a ghost refund.
- The other bill should have the other item and a ghost payment.
For example, you need to cancel a non-refundable night that has already been paid for. After you rebate the bill, you can close the rebated night against a ghost refund, and the cancellation fee against a ghost payment. Make sure you use the same payment type in both bills so they balance each other out.