Hi,
Please don't create a "new" thread problem using a thread which have 7 month old and a totally different problem : You're talking about a specific plugin and not the shipping invoice.
The plugin "attachinvoice" does not work as the rest of HikaShop ; it's an external plugin which have his own working way.
If you want to customize the invoice, you have to edit the "invoice.php" file or create an override (there are several thread talking about that).
The address is displayed directly in the plugin, it does no use the "address_template" configuration of HikaShop.
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.