What you can do is save the preference in the checkout/session
via an observer. First, add the checkbox to the shipping section and give it the property of name=shipping[no_signature]
. Then, create a new module and hook into the event controller_action_postdispatch_checkout_onepage_saveShipping
and then use this code:
public function controller_action_postdispatch_checkout_onepage_saveShipping($observer)
{
$params = (Mage::app()->getRequest()->getParams()) ? Mage::app()->getRequest()->getParams() : array();
if (isset($params['shipping']['no_signature']) && $params['shipping']['no_signature']) {
Mage::getSingleton('checkout/session')->setNoSignature(true);
} else {
Mage::getSingleton('checkout/session')->setNoSignature(false);
}
return $this;
}
Then, when the order is about to be placed, hook into the event sales_order_place_before
you can add a comment to the order like this:
public function sales_order_place_before($observer)
{
$order = $observer->getOrder();
if (Mage::getSingleton('checkout/session')->getNoSignature()) {
$order->setCustomerNote('No signature required.');
} else {
$order->setCustomerNote(null);
}
return $this;
}
When you go to Sales > Orders, you should see a comment on the order regarding if the customer requires a signature or not. This is under the assumption that no other module or custom code is injecting anything into the customer_note
field on the order object.