Hello,
That is the main goal/feature of HikaSerial : Generate unique codes.
With the various generator plugins ; you can create different kind of serials (random codes, HikaShop coupon with a random code, etc).
You also have the "attach serial" and "pdf serial" plugins to create images or PDF which can be added automatically to the confirmation email or be available as a product download.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.