Hi,
Sorry for the delay.
If you use a subscription with Akeeba, each time an order will be generate with the product, when the product have an HikaSerial pack assigned, a new serial will be create attach to the order.
The notification email will contain the order details with the serial data.
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.