Zenoti implements the following checks to ensure only valid vouchers are generated and redeemed:
Irrespective of the method you want to use to create discount vouchers, if the criteria that you set up could result in one or more duplicates with any previous vouchers, the system doesn't generate the codes and prompts you to modify your criteria.
If the Excel file that you try to import contains any duplicate codes, the list of duplicates is displayed to you. To upload the Excel file, you need to delete the duplicate codes from the file.
Discount vouchers can only be redeemed once.
All constraints applicable to discount are also applied to the vouchers.