Hi,
www.hikashop.com/en/support/documentatio....html#checkout_login
Finally, please note that when you sell digital goods, the download of these goods is restricted to the users who bought the digital goods. In order to do that check HikaShop needs you to have user accounts for your users, which means that you will have to use either "registration" or "simplified registration".
The download system is not compatible with the "no registration", it needs a Joomla account.
You can customize your emails in the HikaShop backend and you can edit the HikaSerial views.
So you can add some text before the table of serials and display them on another form. You can add links too if you want.
I do not right understand what is the "gate entry ticket PDF", could you explain more your needs about it ?
Regards,