Hi I have added a custom field on checkout page and it show in order also. But how can I actualy get it from the order in xml file. I already have taken in phtml with this part of code,
<?php $order_ref = $this->htmlEscape($this->getOrder()->getssn());?>.
The module I have used is on this page http://excellencemagentoblog.com/magento-add-custom-fields-checkout-page.
And also I already have tried with previous code to get in xml but it doesn't work any proposition or help please