Hi,
The "generate" function of the HikaSerial generator plugins have in his parameters the order object.
Thanks to the order object, you can have the "$order->order_user_id", so you can access to the user email by loading the HikaShop user.
$userClass = hikaserial::get('shop.class.user');
$user = $userClass->get( $order->order_user_id );
$user->user_email;
www.hikashop.com/support/documentation/1...er.html#fct_generate
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.