diff --git a/src/SafeCharge/Api/Service/PaymentService.php b/src/SafeCharge/Api/Service/PaymentService.php
index 4656e30..5198bdc 100644
--- a/src/SafeCharge/Api/Service/PaymentService.php
+++ b/src/SafeCharge/Api/Service/PaymentService.php
@@ -85,6 +85,31 @@ public function initPayment(array $params)
         return $this->requestJson($params, 'initPayment.do');
     }
 
+    /**
+     * @param array $params
+     *
+     * @return mixed
+     * @throws \SafeCharge\Api\Exception\ConnectionException
+     * @throws \SafeCharge\Api\Exception\ResponseException
+     * @throws \SafeCharge\Api\Exception\ValidationException
+     */
+    public function authorize3d(array $params)
+    {
+        $mandatoryFields = ['merchantId', 'merchantSiteId', 'sessionToken', 'timeStamp', 'checksum', 'currency', 'amount', 'paymentOption', 'relatedTransactionId', 'deviceDetails', 'billingAddress'];
+
+        $checksumParametersOrder = ['merchantId', 'merchantSiteId', 'clientRequestId', 'amount', 'currency', 'timeStamp', 'merchantSecretKey'];
+
+        $params = $this->appendMerchantIdMerchantSiteIdTimeStamp($params);
+
+        $params['checksum']     = Utils::calculateChecksum($params, $checksumParametersOrder, $this->client->getConfig()->getMerchantSecretKey(), $this->client->getConfig()->getHashAlgorithm());
+        $params['sessionToken'] = $this->getSessionToken();
+
+
+        $this->validate($params, $mandatoryFields);
+
+        return $this->requestJson($params, 'authorize3d.do');
+    }
+
     /**
      * @param array $params
      *
diff --git a/tests/PaymentServiceTest.php b/tests/PaymentServiceTest.php
index e181854..790ba4c 100644
--- a/tests/PaymentServiceTest.php
+++ b/tests/PaymentServiceTest.php
@@ -59,18 +59,47 @@ public function testCreatePayment()
      */
     public function testInitPayment()
     {
-        $response = $this->service->createPayment([
+        $response = $this->service->initPayment([
             'currency'       => SimpleData::getCurrency(),
             'amount'         => SimpleData::getAmount(),
             'userTokenId'    => TestCaseHelper::getUserTokenId(),
             'paymentOption'  => [
                 'card' => SimpleData::getCarData()
             ],
-            'billingAddress' => SimpleData::getBillingAddress()
+            'billingAddress' => SimpleData::getBillingAddress(),
+            'deviceDetails'  => SimpleData::getDeviceDetails()
         ]);
         $this->assertEquals('SUCCESS', $response['status']);
     }
 
+    /**
+     * @throws ConnectionException
+     * @throws ResponseException
+     * @throws ValidationException
+     * @run ./vendor/phpunit/phpunit/phpunit --filter testAuthorize3d ./tests/PaymentServiceTest.php
+     */
+    public function testAuthorize3d()
+    {
+        $paramsAuthorize3d = $paramsInitPayment = [
+            'currency'       => SimpleData::getCurrency(),
+            'amount'         => SimpleData::getAmount(),
+            'paymentOption'  => [
+                'card' => SimpleData::getCarData()
+            ],
+            'billingAddress' => SimpleData::getBillingAddress(),
+            'deviceDetails'  => SimpleData::getDeviceDetails(),
+        ];
+
+        $paramsInitPayment['userTokenId'] = TestCaseHelper::getUserTokenId();
+        $initPaymentResponse = $this->service->initPayment($paramsInitPayment);
+
+        $paramsAuthorize3d['relatedTransactionId'] = $initPaymentResponse['transactionId'];
+        $paramsAuthorize3d['sessionToken'] = $initPaymentResponse['sessionToken'];
+        $authorize3dResponse = $this->service->authorize3d($paramsAuthorize3d);
+
+        $this->assertEquals('SUCCESS', $authorize3dResponse['status']);
+    }
+
     /**
      * @return mixed
      * @throws ConnectionException