Digital product download link with serial number

Hello
I sell digital product on our website, but how to send digital product link with serial number for customer when they have paid.
I try several time and can only send download link but not serial number.
Thanks in advanced

Hello,
If you want to handle product serial numbers, you'll probably have to use the HikaSerial extension : hikashop.com/support/documentation/24-do...the-display.html#css