Email packing slip not invoice

Hi! If you don’t want to use the invoice functionality altogether, you can simply copy the contents of packing-slip.php to invoice.php (or switch them). The file will still be called invoice though, but you can change that via the translations or with a filter.

The simplest solution however, is to get the professional extension, as this will allow you to attach the packing slip to any email, in addition to the invoice (and proforma invoice, credit note and static files).

Hope that helps!

Ewout