diff --git a/modules/customer/commerce_customer.api.php b/modules/customer/commerce_customer.api.php
index 99f33d9..0a27818 100644
--- a/modules/customer/commerce_customer.api.php
+++ b/modules/customer/commerce_customer.api.php
@@ -124,3 +124,22 @@ function hook_commerce_customer_profile_presave($profile) {
 function hook_commerce_customer_profile_can_delete($profile) {
   // No example.
 }
+
+/**
+ * Allows modules to alter the AJAX commands when copying customer profiles.
+ *
+ * During checkout the customer selects "My [x_profile] information is the same as
+ * my [y_profile] information." An AJAX callback is triggered. By altering the
+ * array of AJAX commands, a module can add additional commands to the response.
+ *
+ * @param array $commands
+ *   An array of AJAX commands.
+ * @param type $form
+ *   Nested array of form elements that comprise the form.
+ * @param type $form_state
+ *   A keyed array containing the current state of the form.
+ */
+function hook_commerce_customer_profile_copy_callback_alter(&$commands, $form, $form_state) {
+  // Example.
+  $commands[] = ajax_command_alert('It works!');
+}
diff --git a/modules/customer/includes/commerce_customer.checkout_pane.inc b/modules/customer/includes/commerce_customer.checkout_pane.inc
index eebdcc0..9de0483 100644
--- a/modules/customer/includes/commerce_customer.checkout_pane.inc
+++ b/modules/customer/includes/commerce_customer.checkout_pane.inc
@@ -183,7 +183,15 @@ function commerce_customer_profile_pane_checkout_form($form, &$form_state, $chec
  */
 function commerce_customer_profile_copy_ajax_callback($form, &$form_state) {
   $pane_id = reset($form_state['triggering_element']['#parents']);
-  return $form[$pane_id];
+
+  // Add replace element as default AJAX command.
+  $commands = array();
+  $commands[] = ajax_command_replace(NULL, drupal_render($form[$pane_id]));
+
+  // Allow other modules to add arbitrary AJAX commands on the refresh.
+  drupal_alter('commerce_customer_profile_copy_callback', $commands, $form, $form_state);
+
+  return array('#type' => 'ajax', '#commands' => $commands);
 }
 
 /**