Once the system detects that there are valid vouchers available for the product, a new input becomes available in the payment page.
The user can then enter the discount code and press on ‘Apply’. The price will then be adjusted accordingly.
Remark:
Once a discount code is applied, it will be active for the duration of the sale. As a sale has a maximum of 5 minutes, it will thus not be possible to add it to another sale for that timeframe.