diff --git a/Controller/Return/Index.php b/Controller/Return/Index.php
index 0cfba293e..b68f4a322 100755
--- a/Controller/Return/Index.php
+++ b/Controller/Return/Index.php
@@ -161,25 +161,15 @@ protected function validateRedirectResponse(array $redirectResponse): bool
             $paymentsDetailsResponse['error'] = $e->getMessage();
         }
 
-        $result = false;
-
-        // Compare the merchant references
-        $merchantReference = $paymentsDetailsResponse['merchantReference'] ?? null;
-        if ($merchantReference) {
-            if ($order->getIncrementId() === $merchantReference) {
-                $this->order = $order;
-                $this->payment = $order->getPayment();
-                $this->cleanUpRedirectAction();
-
-                $result = $this->paymentResponseHandler->handlePaymentsDetailsResponse(
-                    $paymentsDetailsResponse,
-                    $order
-                );
-            } else {
-                $this->adyenLogger->error("Wrong merchantReference was set in the query or in the session");
-            }
-        } else {
-            $this->adyenLogger->error("No merchantReference in the response");
+        $result = $this->paymentResponseHandler->handlePaymentsDetailsResponse(
+            $paymentsDetailsResponse,
+            $order
+        );
+
+        if ($result) {
+            $this->order = $order;
+            $this->payment = $order->getPayment();
+            $this->cleanUpRedirectAction();
         }
 
         return $result;
diff --git a/Helper/PaymentResponseHandler.php b/Helper/PaymentResponseHandler.php
index 6c11537a9..8c3808222 100644
--- a/Helper/PaymentResponseHandler.php
+++ b/Helper/PaymentResponseHandler.php
@@ -139,6 +139,10 @@ public function handlePaymentsDetailsResponse(
             return false;
         }
 
+        if(!$this->isValidMerchantReference($paymentsDetailsResponse, $order)){
+            return false;
+        }
+
         $this->adyenLogger->addAdyenResult('Updating the order');
         $payment = $order->getPayment();
 
@@ -312,4 +316,27 @@ public function handlePaymentsDetailsResponse(
 
         return $result;
     }
+
+    /**
+     * Validate whether the merchant reference is present in the response and belongs to the current order.
+     *
+     * @param array $paymentsDetailsResponse
+     * @param OrderInterface $order
+     * @return bool
+     */
+    private function isValidMerchantReference(array $paymentsDetailsResponse, OrderInterface $order): bool
+    {
+        $merchantReference = $paymentsDetailsResponse['merchantReference'] ?? null;
+        if (!$merchantReference) {
+            $this->adyenLogger->error("No merchantReference in the response");
+            return false;
+        }
+
+        if ($order->getIncrementId() !== $merchantReference) {
+            $this->adyenLogger->error("Wrong merchantReference was set in the query or in the session");
+            return false;
+        }
+
+        return true;
+    }
 }
diff --git a/Test/Unit/Helper/PaymentResponseHandlerTest.php b/Test/Unit/Helper/PaymentResponseHandlerTest.php
index 8a5b0fc76..6f88669d5 100644
--- a/Test/Unit/Helper/PaymentResponseHandlerTest.php
+++ b/Test/Unit/Helper/PaymentResponseHandlerTest.php
@@ -72,6 +72,7 @@ protected function setUp(): void
         $this->orderMock->method('getQuoteId')->willReturn(1);
         $this->orderMock->method('getPayment')->willReturn($this->paymentMock);
         $this->orderMock->method('getStatus')->willReturn('pending');
+        $this->orderMock->method('getIncrementId')->willReturn('00123456');
 
         $this->orderHelperMock->method('setStatusOrderCreation')->willReturn( $this->orderMock);
 
@@ -117,7 +118,7 @@ public function testFormatPaymentResponseForFinalResultCodes($resultCode)
         $this->assertEquals($expectedResult, $result);
     }
 
-    private static function dataSourceForFormatPaymentResponseActionRequredPayments(): array
+    private static function dataSourceForFormatPaymentResponseActionRequiredPayments(): array
     {
         return [
             ['resultCode' => PaymentResponseHandler::REDIRECT_SHOPPER, 'action' => ['type' => 'qrCode']],
@@ -131,7 +132,7 @@ private static function dataSourceForFormatPaymentResponseActionRequredPayments(
      * @param $resultCode
      * @param $action
      * @return void
-     * @dataProvider dataSourceForFormatPaymentResponseActionRequredPayments
+     * @dataProvider dataSourceForFormatPaymentResponseActionRequiredPayments
      */
     public function testFormatPaymentResponseForActionRequiredPayments($resultCode, $action)
     {
@@ -239,7 +240,8 @@ public function testHandlePaymentsDetailsResponseAuthorised()
             'details' => [
                 'someData' => 'someValue'
             ],
-            'donationToken' => 'XYZ123456789'
+            'donationToken' => 'XYZ123456789',
+            'merchantReference' => '00123456'
         ];
 
         $this->quoteHelperMock->method('disableQuote')->willThrowException(new Exception());
@@ -281,7 +283,8 @@ public function testHandlePaymentsDetailsResponsePending($paymentMethodCode)
             'pspReference' => 'ABC123456789',
             'paymentMethod' => [
                 'brand' => $paymentMethodCode
-            ]
+            ],
+            'merchantReference' => '00123456'
         ];
 
         $result = $this->paymentResponseHandler->handlePaymentsDetailsResponse(
@@ -314,7 +317,8 @@ public function testHandlePaymentsDetailsResponseReceived($paymentMethodCode, $e
             'pspReference' => 'ABC123456789',
             'paymentMethod' => [
                 'brand' => $paymentMethodCode
-            ]
+            ],
+            'merchantReference' => '00123456'
         ];
 
         $result = $this->paymentResponseHandler->handlePaymentsDetailsResponse(
@@ -350,6 +354,7 @@ public function testHandlePaymentsDetailsResponseActionRequired($resultCode)
             'paymentMethod' => [
                 'brand' => 'ideal'
             ],
+            'merchantReference' => '00123456',
             'action' => [
                 'actionData' => 'actionValue'
             ]
@@ -388,6 +393,7 @@ public function testHandlePaymentsDetailsResponseCancelOrRefused($resultCode)
             'paymentMethod' => [
                 'brand' => 'ideal'
             ],
+            'merchantReference' => '00123456',
             'action' => [
                 'actionData' => 'actionValue'
             ]
@@ -431,4 +437,22 @@ public function testHandlePaymentsDetailsEmptyResponse()
 
         $this->assertFalse($result);
     }
+
+    public function testHandlePaymentsDetailsResponseInvalidMerchantReference(){
+        $paymentsDetailsResponse = [
+            'resultCode' => PaymentResponseHandler::AUTHORISED,
+            'pspReference' => 'ABC123456789',
+            'paymentMethod' => [
+                'brand' => 'ideal'
+            ],
+            'merchantReference' => '00777777'
+        ];
+
+        $result = $this->paymentResponseHandler->handlePaymentsDetailsResponse(
+            $paymentsDetailsResponse,
+            $this->orderMock
+        );
+
+        $this->assertFalse($result);
+    }
 }