Intrum_Cdp

1. Open app/code/local/Intrum/Cdp/etc/config.xml and find the following section:

   <controller_action_predispatch_checkout_onepage_saveBilling>
       <observers>
           <auto_register_shipping>
               <type>singleton</type>
               <class>intrum/observer</class>
               <method>checkout_controller_onepage_save_billing_method</method>
           </auto_register_shipping>
       </observers>
   </controller_action_predispatch_checkout_onepage_saveBilling>
   

2. Replace it with:

   <controller_action_predispatch_checkout_onepage_saveBilling>
       <observers>
           <auto_register_shipping>
               <type>singleton</type>
               <class>intrum/observer</class>
               <method>checkout_controller_onepage_save_billing_method</method>
           </auto_register_shipping>
       </observers>
   </controller_action_predispatch_checkout_onepage_saveBilling>
   <controller_action_predispatch_firecheckout_index_saveBilling>
       <observers>
           <auto_register_shipping>
               <type>singleton</type>
               <class>intrum/observer</class>
               <method>checkout_controller_onepage_save_billing_method</method>
           </auto_register_shipping>
       </observers>
   </controller_action_predispatch_firecheckout_index_saveBilling>
   

3. Navigate to “System > Configuration > Intrum > Configuration > Risk managment activation places (for developers)” and add the following line:

   firecheckout,index

4. Save config and clean magento cache.