diff --git a/Plugin/PluginUtility.php b/Plugin/PluginUtility.php
index 1ffb50e..a1edabd 100755
--- a/Plugin/PluginUtility.php
+++ b/Plugin/PluginUtility.php
@@ -11,6 +11,7 @@
 use Exception;
 use Magento\SalesRule\Model\CouponFactory;
 use MagePal\LimitGuestCheckoutCoupon\Helper\Data;
+use Magento\Sales\Model\ResourceModel\Order\CollectionFactory;
 
 class PluginUtility
 {
@@ -25,17 +26,26 @@ class PluginUtility
     protected $helperData;
 
     /**
-     * PluginUtility constructor.
-     * @param CouponFactory $couponFactory
-     * @param Data $helperData
+     * @var \Magento\Sales\Model\ResourceModel\Order\CollectionFactory
+     */
+    protected $_orderCollectionFactory;
+
+    /**
+     * @param \Magento\SalesRule\Model\CouponFactory $couponFactory
+     * @param \MagePal\LimitGuestCheckoutCoupon\Helper\Data $helperData
+     * @param \MagePal\LimitGuestCheckoutCoupon\Logger\Logger $logger
+     * @param \Magento\Sales\Model\ResourceModel\Order\CollectionFactory $orderCollectionFactory
      */
     public function __construct(
         CouponFactory $couponFactory,
-        Data $helperData
+        Data $helperData,
+        CollectionFactory $orderCollectionFactory
     ) {
         $this->couponFactory = $couponFactory;
         $this->helperData = $helperData;
+        $this->_orderCollectionFactory = $orderCollectionFactory;
     }
+
     /**
      * @param $subject
      * @param Closure $proceed
@@ -48,17 +58,38 @@ public function aroundCanProcessRule($subject, Closure $proceed, $rule, $address
     {
         $result = $proceed($rule, $address);
 
-        $couponCode = $address->getQuote()->getCouponCode();
+        if (!$this->helperData->isEnabled()) {
+            return $result;
+        }
+
+        $quote = $address->getQuote();
+        $couponCode = $quote->getCouponCode();
+
+        if ($couponCode) {
 
-        if ($this->helperData->isEnabled() && $couponCode) {
             $coupon = $this->couponFactory->create();
             $coupon->load($couponCode, 'code');
 
-            if ($coupon->getId() && $rule->getUsesPerCoupon()
-                && $coupon->getTimesUsed() >= $rule->getUsesPerCoupon()
-            ) {
+            if ($coupon->getId() &&
+                $rule->getUsesPerCoupon() &&
+                $coupon->getTimesUsed() >= $rule->getUsesPerCoupon()) {
                 $result = false;
             }
+
+            $customerId = $quote->getCustomerId();
+            $email = $quote->getBillingAddress()->getEmail();
+
+            if ($coupon->getId() && !$customerId && $email) {
+
+                $collection = $this->_orderCollectionFactory->create()
+                    ->addAttributeToSelect('*')
+                    ->addFieldToFilter('customer_email', ['eq' => $email])
+                    ->addFieldToFilter('coupon_code', ['eq' => $couponCode]);
+    
+                if ($collection->getSize() >= $rule->getUsesPerCustomer()) {
+                    $result = false;
+                }
+            }
         }
 
         return $result;