<span class="" style="color: #f3e504; font-size: 250%;" >{{#fas:lightbulb}} </span> Use the booking number as code when issuing the voucher as a discount on a cancelled booking. If the guest books with the voucher, you can then take the code from the field "Rate description" in the tab "Charges and payments" of the booking to find the original booking. You can then combine both of them into a group booking using the "Add existing booking to group" function in the "Invoice" tab.
The same one time code can be defined multiple times, each time it is used, the first one in the list will be deleted, once they have all been deleted it will no longer be available.
==Reporting==
In REPORTS->CUSTOM REPORTS you can create custom reports which include the voucher codes.