If one or more invoices have already been created for a reservation for pre-ordered meals or tickets but have not yet been paid, these must be cancelled before rebooking. Paid invoices are simply rebooked as well.

1. For invoices that have not yet been sent, change the status to "Cancelled".
2. For invoices that have already been sent, create a Transfer invoice :
   1. In the reservation, go to the tab Invoices.
   2. Click on the right in the horizontal toolbar on  Create transfer invoice. The amounts of all unpaid invoices are credited in the transfer invoice.
   3. Assign a spreadsheet template and  send print or export the transfer invoice.