diff --git a/commerce_purchase_order.module b/commerce_purchase_order.module
index 8800430..6266011 100644
--- a/commerce_purchase_order.module
+++ b/commerce_purchase_order.module
@@ -239,3 +239,33 @@ function commerce_purchase_order_number_from_order_id($order_id) {
     return '';
   }
 }
+
+/**
+ * Returns the list of all PO payment method instances.
+ */
+function commerce_purchase_order_payment_method_instances() {
+  $instance_ids = array();
+
+  // load all rules.
+  $rules_configs = rules_config_load_multiple(FALSE);
+
+  // find all rules with an action to enable PO payment method.
+  foreach ($rules_configs as $rule_name => $rule) {
+    // Only rules and sub-types have actions.
+    if (!($rule instanceof Rule)) {
+      continue;
+    }
+    foreach ($rule->actions() as $action) {
+      // skip any actions that are not simple rules actions, ie loops
+      if (!($action instanceof RulesAction)) {
+        continue;
+      }
+      if ($action->getElementName() == 'commerce_payment_enable_commerce_purchase_order') {
+        $instance_ids[] = commerce_payment_method_instance_id('commerce_purchase_order', $rule);
+        continue 2; // skip to next rule
+      }
+    }
+  }
+
+  return $instance_ids;
+}
diff --git a/commerce_purchase_order.rules.inc b/commerce_purchase_order.rules.inc
new file mode 100644
index 0000000..ae5a4f1
--- /dev/null
+++ b/commerce_purchase_order.rules.inc
@@ -0,0 +1,130 @@
+<?php
+
+/**
+ * Implements hook_rules_action_info().
+ */
+function commerce_purchase_order_rules_action_info() {
+  $actions = array();
+
+  $actions['commerce_purchase_order_issue_po'] = array(
+    'label' => t('charge an order with a purchase order'),
+    'group' => t('Commerce Purchase Order'),
+    'parameter' => array(
+      'order' => array(
+        'type' => 'commerce_order',
+        'label' => t('Order'),
+      ),
+      'charge' => array(
+        'type' => 'commerce_price',
+        'label' => t('Charge'),
+        'description' => t('The charge amount and currency. If not provided, then the order balance will be used.'),
+        'optional' => TRUE,
+      ),
+      'po_number' => array(
+        'type' => 'text',
+        'label' => t('Purchase Order number'),
+        'description' => t('If not provided, current timestamp and order ID will be used'),
+        'optional' => TRUE,
+      ),
+      'forced_instance_id' => array(
+        'type' => 'text',
+        'label' => t('Payment method instance id'),
+        'options list' => 'commerce_purchase_order_rules_payment_instance_charge_options_list',
+        'optional' => TRUE,
+      ),
+    ),
+    'provides' => array(
+      'issue_po_response' => array(
+        'type' => 'commerce_purchase_order_issue_po_response',
+        'label' => t('issue PO Response'),
+        'save' => FALSE,
+      ),
+    ),
+    'callbacks' => array(
+      'execute' => 'commerce_purchase_order_rules_issue_po_action',
+    ),
+  );
+
+  return $actions;
+}
+
+function commerce_purchase_order_rules_issue_po_action($order, $charge = NULL, $po_number = NULL, $forced_instance_id = NULL) {
+  $response = array(
+    'status' => FALSE,
+    'code' => 'insufficient',
+    'message' => '',
+    'message_variables' => array(),
+  );
+
+  // Exit if the order does not have order_id.
+  if (empty($order->order_id)) {
+    $response['message'] = 'Order ID is not provided.';
+    return $response;
+  }
+  $response['message_variables'] += array(
+    '@order_id' => $order->order_id,
+  );
+
+  // Exit if no user associated with the order.
+  if (empty($order->uid)) {
+    $response['message'] = 'Order owner not provided for order @order_id.';
+    return $response;
+  }
+  $response['message_variables'] += array(
+    '@uid' => $order->uid,
+  );
+
+  // Set charge to order balance if none provided.
+  if (empty($charge)) {
+    $charge = commerce_payment_order_balance($order);
+  }
+
+  // Exit if no charge.
+  if (empty($charge) || empty($charge['amount']) || empty($charge['currency_code'])) {
+    $response['message'] = 'Charge amount not provided for order @order_id.';
+    return $response;
+  }
+  $response['message_variables'] += array(
+    '@charge' => commerce_currency_format($charge['amount'], $charge['currency_code']),
+  );
+
+  // Default PO number to timestamp-order_id.
+  if (empty($po_number)) {
+    $po_number = time() . '-' . $order->order_id;
+  }
+
+  // Load payment method.
+  $payment_method = commerce_payment_method_load('commerce_purchase_order');
+
+  // Set forced instance ID
+  if(!empty($forced_instance_id)) {
+    $order->data['payment_method'] = $forced_instance_id;
+    $response['message_variables'] += array(
+      '@instance_id' => $forced_instance_id,
+    );
+    $payment_method['instance_id'] = $forced_instance_id;
+  }
+
+  // Void function! Assume success.
+  commerce_purchase_order_transaction($payment_method, $order, $charge, $po_number);
+  $response['status'] = TRUE;
+  $response['code'] = 'success';
+  $response['message'] = 'The payment method  @method instance (@instance_id) was successful for order @order_id, user @uid, charge amount @charge.';
+
+  return array('charge_po_response' => $response);
+}
+
+/**
+ * Options list for payment method instances that provide a charge callback
+ */
+function commerce_purchase_order_rules_payment_instance_charge_options_list() {
+  $options = array('' => t('- None -'));
+  $payment_method_instances = commerce_purchase_order_payment_method_instances();
+
+  foreach ($payment_method_instances as $instance_id) {
+    list($method_id_part, $rule_name) = explode('|', $instance_id);
+    $options[$instance_id] = $rule_name;
+  }
+
+  return $options;
+}