diff --git a/Gateway/Request/PaymentDataBuilder.php b/Gateway/Request/PaymentDataBuilder.php
index f899d3d71..ac77ffdeb 100644
--- a/Gateway/Request/PaymentDataBuilder.php
+++ b/Gateway/Request/PaymentDataBuilder.php
@@ -14,6 +14,7 @@
 use Adyen\Exception\MissingDataException;
 use Adyen\Payment\Helper\ChargedCurrency;
 use Adyen\Payment\Helper\Requests;
+use Magento\Checkout\Model\Session as CheckoutSession;
 use Magento\Framework\Exception\LocalizedException;
 use Magento\Payment\Gateway\Data\PaymentDataObject;
 use Magento\Payment\Gateway\Helper\SubjectReader;
@@ -31,18 +32,26 @@ class PaymentDataBuilder implements BuilderInterface
      */
     private $chargedCurrency;
 
+    /**
+     * @var CheckoutSession
+     */
+    private CheckoutSession $checkoutSession;
+
     /**
      * PaymentDataBuilder constructor.
      *
      * @param Requests $adyenRequestsHelper
      * @param ChargedCurrency $chargedCurrency
+     * @param CheckoutSession $checkoutSession
      */
     public function __construct(
         Requests $adyenRequestsHelper,
-        ChargedCurrency $chargedCurrency
+        ChargedCurrency $chargedCurrency,
+        CheckoutSession $checkoutSession
     ) {
         $this->adyenRequestsHelper = $adyenRequestsHelper;
         $this->chargedCurrency = $chargedCurrency;
+        $this->checkoutSession = $checkoutSession;
     }
 
     /**
@@ -55,20 +64,23 @@ public function build(array $buildSubject): array
     {
         /** @var PaymentDataObject $paymentDataObject */
         $paymentDataObject = SubjectReader::readPayment($buildSubject);
-
-        $order = $paymentDataObject->getOrder();
         $payment = $paymentDataObject->getPayment();
         $fullOrder = $payment->getOrder();
-
+        $quote = $this->checkoutSession->getQuote();
         $amountCurrency = $this->chargedCurrency->getOrderAmountCurrency($fullOrder);
         $currencyCode = $amountCurrency->getCurrencyCode();
         $amount = $amountCurrency->getAmount();
-        $reference = $order->getOrderIncrementId();
+        $reference = $fullOrder->getIncrementId();
+
+        $shopperConversionIdData = $quote->getPayment()->getAdditionalInformation('shopper_conversion_id');
+
+        $shopperConversionId = !empty($shopperConversionIdData) ? (string) json_decode($shopperConversionIdData, true) : '';
 
         $request['body'] = $this->adyenRequestsHelper->buildPaymentData(
             $amount,
             $currencyCode,
             $reference,
+            $shopperConversionId,
             []
         );
 
diff --git a/Helper/GenerateShopperConversionId.php b/Helper/GenerateShopperConversionId.php
new file mode 100644
index 000000000..6948f1a2d
--- /dev/null
+++ b/Helper/GenerateShopperConversionId.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Adyen\Payment\Helper;
+
+use Magento\Framework\App\Helper\AbstractHelper;
+use Magento\Framework\App\Helper\Context;
+use Adyen\Payment\Helper\Util\Uuid;
+use Magento\Checkout\Model\Session as CheckoutSession;
+
+class GenerateShopperConversionId extends AbstractHelper
+{
+    const SHOPPER_CONVERSION_ID = 'shopper_conversion_id';
+
+    /**
+     * @var CheckoutSession
+     */
+    private $checkoutSession;
+
+    /**
+     * @param Context $context
+     * @param CheckoutSession $checkoutSession
+     */
+    public function __construct(
+        Context $context,
+        CheckoutSession $checkoutSession,
+    ) {
+        parent::__construct($context);
+        $this->checkoutSession = $checkoutSession;
+    }
+
+    /**
+     * Get or generate a ShopperConversionID
+     *
+     * @return string
+     */
+    public function getShopperConversionId(): string
+    {
+        $shopperConversionId = Uuid::generateV4();
+
+        $quote = $this->checkoutSession->getQuote();
+        $payment = $quote->getPayment();
+
+        // Store shopperConversionId in additional information
+        $payment->setAdditionalInformation(self::SHOPPER_CONVERSION_ID, json_encode($shopperConversionId));
+
+        // Save the quote to persist additional_information
+        $quote->setPayment($payment);
+        $quote->save();
+
+        return $shopperConversionId;
+    }
+}
diff --git a/Helper/PaymentMethods.php b/Helper/PaymentMethods.php
index ee1f0f283..353bb2622 100644
--- a/Helper/PaymentMethods.php
+++ b/Helper/PaymentMethods.php
@@ -46,6 +46,7 @@
 use Magento\Store\Model\Store;
 use Magento\Vault\Api\PaymentTokenRepositoryInterface;
 use Magento\Framework\Api\SearchCriteriaBuilder;
+use Magento\Checkout\Model\Session as CheckoutSession;
 
 class PaymentMethods extends AbstractHelper
 {
@@ -171,6 +172,16 @@ class PaymentMethods extends AbstractHelper
      */
     private SearchCriteriaBuilder $searchCriteriaBuilder;
 
+    /**
+     * @var GenerateShopperConversionId
+     */
+    private GenerateShopperConversionId $generateShopperConversionId;
+
+    /**
+     * @var CheckoutSession
+     */
+    private CheckoutSession $checkoutSession;
+
     /**
      * @param Context $context
      * @param CartRepositoryInterface $quoteRepository
@@ -190,6 +201,8 @@ class PaymentMethods extends AbstractHelper
      * @param Data $adyenDataHelper
      * @param PaymentTokenRepositoryInterface $paymentTokenRepository
      * @param SearchCriteriaBuilder $searchCriteriaBuilder
+     * @param GenerateShopperConversionId $generateShopperConversionId
+     * @param CheckoutSession $checkoutSession
      */
     public function __construct(
         Context $context,
@@ -209,7 +222,9 @@ public function __construct(
         SerializerInterface $serializer,
         AdyenDataHelper $adyenDataHelper,
         PaymentTokenRepositoryInterface $paymentTokenRepository,
-        SearchCriteriaBuilder $searchCriteriaBuilder
+        SearchCriteriaBuilder $searchCriteriaBuilder,
+        GenerateShopperConversionId $generateShopperConversionId,
+        CheckoutSession $checkoutSession,
     ) {
         parent::__construct($context);
         $this->quoteRepository = $quoteRepository;
@@ -229,6 +244,8 @@ public function __construct(
         $this->adyenDataHelper = $adyenDataHelper;
         $this->paymentTokenRepository = $paymentTokenRepository;
         $this->searchCriteriaBuilder = $searchCriteriaBuilder;
+        $this->generateShopperConversionId = $generateShopperConversionId;
+        $this->checkoutSession = $checkoutSession;
     }
 
     /**
@@ -581,6 +598,18 @@ protected function getPaymentMethodsRequest(
                 $this->adyenDataHelper->padShopperReference($this->getCurrentShopperReference());
         }
 
+        $quote = $this->checkoutSession->getQuote();
+
+        $shopperConversionIdData = $quote->getPayment()->getAdditionalInformation('shopper_conversion_id');
+
+        $shopperConversionId = !empty($shopperConversionIdData) ? (string) json_decode($shopperConversionIdData, true) : '';
+
+        if(!empty($shopperConversionId)) {
+            $shopperConversionId = $this->generateShopperConversionId->getShopperConversionId();
+            $paymentMethodRequest["shopperConversionId"] = $shopperConversionId;
+        }
+
+
         $amountValue = $this->adyenHelper->formatAmount($this->getCurrentPaymentAmount(), $currencyCode);
 
         if (!empty($amountValue)) {
diff --git a/Helper/Requests.php b/Helper/Requests.php
index 0d6594d94..62f201129 100644
--- a/Helper/Requests.php
+++ b/Helper/Requests.php
@@ -14,7 +14,7 @@
 use Adyen\Payment\Model\Config\Source\CcType;
 use Adyen\Payment\Model\Ui\AdyenCcConfigProvider;
 use Adyen\Payment\Model\Ui\AdyenPayByLinkConfigProvider;
-use Adyen\Util\Uuid;
+use Adyen\Payment\Helper\Util\Uuid;
 use Magento\Framework\App\Helper\AbstractHelper;
 use Magento\Framework\App\Request\Http as Http;
 
@@ -276,20 +276,23 @@ public function buildAddressData($billingAddress, $shippingAddress, $storeId, $r
     }
 
     /**
-     * @param array $request
      * @param $amount
      * @param $currencyCode
      * @param $reference
+     * @param $shopperConversionId
+     * @param array $request
      * @return array
      */
-    public function buildPaymentData($amount, $currencyCode, $reference, array $request = [])
+    public function buildPaymentData($amount, $currencyCode, $reference, $shopperConversionId,array $request = []): array
     {
+        var_dump($amount);
         $request['amount'] = [
             'currency' => $currencyCode,
             'value' => $this->adyenHelper->formatAmount($amount, $currencyCode)
         ];
 
         $request["reference"] = $reference;
+        $request["shopperConversionId"] = $shopperConversionId;
 
         return $request;
     }
diff --git a/Helper/Util/Uuid.php b/Helper/Util/Uuid.php
new file mode 100644
index 000000000..45f3fa066
--- /dev/null
+++ b/Helper/Util/Uuid.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace Adyen\Payment\Helper\Util;
+
+use RuntimeException;
+
+/**
+ * Class Uuid
+ *
+ * Utility class for generating UUID version 4.
+ *
+ * @package Adyen\Payment\Helper\Util
+ */
+class Uuid
+{
+    /**
+     * Generate a UUID v4 (random-based).
+     *
+     * A UUID v4 is a universally unique identifier that is generated using
+     * random numbers. It follows the RFC 4122 standard.
+     *
+     * @return string A randomly generated UUID v4.
+     * @throws RuntimeException If secure random generation fails.
+     */
+    public static function generateV4(): string
+    {
+        try {
+            $random = random_bytes(16);
+        } catch (\Exception $e) {
+            throw new RuntimeException('Failed to generate a secure UUID: ' . $e->getMessage(), 0, $e);
+        }
+
+        // Set the version to 4 (0100)
+        $random[6] = chr((ord($random[6]) & 0x0f) | 0x40);
+
+        // Set the variant to RFC 4122 (10xx)
+        $random[8] = chr((ord($random[8]) & 0x3f) | 0x80);
+
+        // Convert binary to hexadecimal and format as UUID
+        return sprintf(
+            '%08s-%04s-%04s-%04s-%12s',
+            bin2hex(substr($random, 0, 4)),
+            bin2hex(substr($random, 4, 2)),
+            bin2hex(substr($random, 6, 2)),
+            bin2hex(substr($random, 8, 2)),
+            bin2hex(substr($random, 10, 6))
+        );
+    }
+}
diff --git a/Test/Unit/Gateway/Request/PaymentDataBuilderTest.php b/Test/Unit/Gateway/Request/PaymentDataBuilderTest.php
new file mode 100644
index 000000000..93f95c673
--- /dev/null
+++ b/Test/Unit/Gateway/Request/PaymentDataBuilderTest.php
@@ -0,0 +1,145 @@
+<?php
+
+namespace Adyen\Payment\Test\Unit\Gateway\Request;
+
+use Adyen\Exception\MissingDataException;
+use Adyen\Payment\Gateway\Request\PaymentDataBuilder;
+use Adyen\Payment\Helper\ChargedCurrency;
+use Adyen\Payment\Helper\Requests;
+use Adyen\Payment\Model\AdyenAmountCurrency;
+use Adyen\Payment\Model\Method\Adapter;
+use Adyen\Payment\Model\Ui\AdyenCcConfigProvider;
+use Adyen\Payment\Test\Unit\AbstractAdyenTestCase;
+use Magento\Checkout\Model\Session as CheckoutSession;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Payment\Gateway\Data\OrderAdapterInterface;
+use Magento\Payment\Gateway\Data\PaymentDataObject;
+use Magento\Payment\Model\InfoInterface;
+use Magento\Quote\Model\Quote;
+use Magento\Quote\Model\Quote\Payment;
+use Magento\Sales\Model\Order;
+use PHPUnit\Framework\MockObject\MockObject;
+
+class PaymentDataBuilderTest extends AbstractAdyenTestCase
+{
+    private ?PaymentDataBuilder $paymentDataBuilder;
+    private MockObject|Requests $adyenRequestsHelperMock;
+    private MockObject|ChargedCurrency $chargedCurrencyMock;
+    private MockObject|CheckoutSession $checkoutSessionMock;
+    private MockObject|PaymentDataObject $paymentDataObjectMock;
+    private MockObject|OrderAdapterInterface $orderMock;
+    private MockObject|InfoInterface $paymentMock;
+    private MockObject|Quote $quoteMock;
+    private MockObject|Payment $quotePaymentMock;
+    private string $mockShopperConversionId = 'mock-shopper-conversion-id';
+
+    /**
+     * Set up the test environment
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->adyenRequestsHelperMock = $this->createMock(Requests::class);
+        $this->chargedCurrencyMock = $this->createMock(ChargedCurrency::class);
+        $this->checkoutSessionMock = $this->createMock(CheckoutSession::class);
+
+        $this->paymentDataBuilder = new PaymentDataBuilder(
+            $this->adyenRequestsHelperMock,
+            $this->chargedCurrencyMock,
+            $this->checkoutSessionMock
+        );
+
+        // Mock PaymentDataObject
+        $this->paymentDataObjectMock = $this->createMock(PaymentDataObject::class);
+        $this->orderMock = $this->createMock(OrderAdapterInterface::class);
+        $this->paymentMock = $this->createMock(InfoInterface::class);
+        $this->quoteMock = $this->createMock(Quote::class);
+        $this->quotePaymentMock = $this->createMock(Payment::class);
+    }
+
+    /**
+     * Tear down the test environment
+     */
+    protected function tearDown(): void
+    {
+        $this->paymentDataBuilder = null;
+        parent::tearDown();
+    }
+
+    /**
+     * Test build() method
+     *
+     * @throws MissingDataException
+     * @throws LocalizedException
+     */
+    public function testBuild(): void
+    {
+        $mockCurrencyCode = 'EUR';
+        $mockAmount = 100.00;
+        $mockReference = '000000123';
+
+        // Mock CheckoutSession interaction
+        $this->checkoutSessionMock->expects($this->once())
+            ->method('getQuote')
+            ->willReturn($this->quoteMock);
+
+        // Mock Quote Payment Additional Information
+        $this->quoteMock->expects($this->once())
+            ->method('getPayment')
+            ->willReturn($this->quotePaymentMock);
+
+        $this->quotePaymentMock->expects($this->once())
+            ->method('getAdditionalInformation')
+            ->with('shopper_conversion_id')
+            ->willReturn($this->mockShopperConversionId);
+
+        // Mock Adyen Requests Helper call
+        $expectedRequestData = [
+                'amount' => [
+                    'currency' => $mockCurrencyCode,
+                    'value' => $mockAmount, // Ensure the formatted value matches
+                ],
+                'reference' => $mockReference,
+                'shopperConversionId' => $this->mockShopperConversionId,
+        ];
+
+
+        $orderMock = $this->createMock(Order::class);
+        $orderMock->method('getIncrementId')->willReturn($mockReference);
+
+
+        $paymentMock = $this->createMock(\Magento\Sales\Model\Order\Payment::class);
+        $paymentMock->method('getOrder')->willReturn($orderMock);
+
+        $adyenAmountCurrencyMock = $this->createMock(AdyenAmountCurrency::class);
+        $adyenAmountCurrencyMock->method('getCurrencyCode')->willReturn($mockCurrencyCode);
+        $adyenAmountCurrencyMock->method('getAmount')->willReturn($mockAmount);
+
+        $this->chargedCurrencyMock->method('getOrderAmountCurrency')
+            ->with($orderMock)
+            ->willReturn($adyenAmountCurrencyMock);
+
+        $buildSubject = [
+            'payment' => $this->createConfiguredMock(PaymentDataObject::class, [
+                'getPayment' => $paymentMock
+            ])
+        ];
+
+        $this->adyenRequestsHelperMock->expects($this->once())
+            ->method('buildPaymentData')
+            ->with(
+                $mockAmount,
+                $mockCurrencyCode,
+                $mockReference,
+                $this->mockShopperConversionId,
+                []
+            )
+            ->willReturn($expectedRequestData);
+
+        $result = $this->paymentDataBuilder->build($buildSubject);
+        $this->assertIsArray($result);
+        $this->assertArrayHasKey('body', $result);
+        $this->assertEquals($expectedRequestData, $result['body']);
+    }
+}
diff --git a/Test/Unit/Helper/GenerateShopperConversionIdTest.php b/Test/Unit/Helper/GenerateShopperConversionIdTest.php
new file mode 100644
index 000000000..0b7a074f2
--- /dev/null
+++ b/Test/Unit/Helper/GenerateShopperConversionIdTest.php
@@ -0,0 +1,72 @@
+<?php
+
+namespace Adyen\Payment\Test\Unit\Helper;
+
+use Adyen\Payment\Helper\GenerateShopperConversionId;
+use Adyen\Payment\Test\Unit\AbstractAdyenTestCase;
+use Magento\Checkout\Model\Session as CheckoutSession;
+use Magento\Framework\App\Helper\Context;
+use Magento\Quote\Model\Quote;
+use Magento\Quote\Model\Quote\Payment;
+use PHPUnit\Framework\MockObject\MockObject;
+
+class GenerateShopperConversionIdTest extends AbstractAdyenTestCase
+{
+    private ?GenerateShopperConversionId $helper;
+    private MockObject|CheckoutSession $checkoutSessionMock;
+    private MockObject|Quote $quoteMock;
+    private MockObject|Payment $paymentMock;
+    private MockObject|Context $contextMock;
+
+    /**
+     * Set up the test environment
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->contextMock = $this->createMock(Context::class);
+        $this->checkoutSessionMock = $this->createMock(CheckoutSession::class);
+        $this->quoteMock = $this->createMock(Quote::class);
+        $this->paymentMock = $this->createMock(Payment::class);
+
+        $this->helper = new GenerateShopperConversionId(
+            $this->contextMock,
+            $this->checkoutSessionMock
+        );
+    }
+
+    /**
+     * Tear down the test environment
+     */
+    protected function tearDown(): void
+    {
+        $this->helper = null;
+        parent::tearDown();
+    }
+
+    /**
+     * Test getShopperConversionId method
+     */
+    public function testGetShopperConversionId(): void
+    {
+        $this->checkoutSessionMock->expects($this->once())
+            ->method('getQuote')
+            ->willReturn($this->quoteMock);
+
+        $this->quoteMock->expects($this->once())
+            ->method('getPayment')
+            ->willReturn($this->paymentMock);
+
+        $this->quoteMock->expects($this->once())
+            ->method('setPayment')
+            ->with($this->paymentMock);
+
+        $this->quoteMock->expects($this->once())
+            ->method('save');
+
+        $result = $this->helper->getShopperConversionId();
+
+        $this->assertNotNull($result);
+    }
+}
diff --git a/Test/Unit/Helper/PaymentMethodsTest.php b/Test/Unit/Helper/PaymentMethodsTest.php
index f3260d0fa..0a05b5cae 100644
--- a/Test/Unit/Helper/PaymentMethodsTest.php
+++ b/Test/Unit/Helper/PaymentMethodsTest.php
@@ -51,6 +51,8 @@
 use Adyen\AdyenException;
 use Exception;
 use ReflectionMethod;
+use Adyen\Payment\Helper\GenerateShopperConversionId;
+use Magento\Checkout\Model\Session as CheckoutSession;
 
 class PaymentMethodsTest extends AbstractAdyenTestCase
 {
@@ -73,6 +75,8 @@ class PaymentMethodsTest extends AbstractAdyenTestCase
     private AdyenDataHelper $adyenDataHelperMock;
     private PaymentTokenRepositoryInterface $paymentTokenRepository;
     private SearchCriteriaBuilder $searchCriteriaBuilder;
+    private CheckoutSession $checkoutSession;
+    private GenerateShopperConversionId $generateShopperConversionId;
 
     protected function setUp(): void
     {
@@ -116,6 +120,8 @@ protected function setUp(): void
             ->disableOriginalConstructor()
             ->getMock();
         $this->objectManager = new ObjectManager($this);
+        $this->checkoutSession = $this->createMock(CheckoutSession::class);
+        $this->generateShopperConversionId = $this->createMock(GenerateShopperConversionId::class);
 
         // Instantiate the PaymentMethods helper class with the mocked dependencies
         $this->paymentMethodsHelper = new PaymentMethods(
@@ -136,7 +142,9 @@ protected function setUp(): void
             $this->serializerMock,
             $this->adyenDataHelperMock,
             $this->paymentTokenRepository,
-            $this->searchCriteriaBuilder
+            $this->searchCriteriaBuilder,
+            $this->generateShopperConversionId,
+            $this->checkoutSession
         );
     }
 
@@ -419,59 +427,94 @@ public function testFetchPaymentMethodsWithEmptyResponseFromAdyenApi()
         $quoteId = 1;
         $storeId = 1;
         $amountValue = 100;
+        $shopperConversionId = '59e9d008-b427-47ae-b9b9-95c43d4ac3f6';
         $adyenClientMock = $this->createMock(Client::class);
         $checkoutServiceMock = $this->createMock(Checkout\PaymentsApi::class);
-        // Setup test scenario
+
+        $this->quoteMock = $this->getMockBuilder(Quote::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['getPayment', 'getStore', 'getBillingAddress'])
+            ->getMock();
+
+        // Mock store ID retrieval
         $this->storeMock->expects($this->any())
             ->method('getId')
             ->willReturn($quoteId);
 
-        // Mock the getId method of the quote to return the quoteId
+        // Mock store retrieval from quote
         $this->quoteMock->expects($this->any())
             ->method('getStore')
             ->willReturn($this->storeMock);
+
+        // Mock fetching merchant account configuration
         $this->configHelperMock->expects($this->once())
             ->method('getAdyenAbstractConfigData')
-            ->with('merchant_account', $storeId) // Ensure it's called with the expected parameters
-            ->willReturn('mocked_merchant_account'); // Define the return value for the mocked method
+            ->with('merchant_account', $storeId)
+            ->willReturn('mocked_merchant_account');
+
+        // Mock Adyen client and API initialization
         $this->adyenHelperMock->method('initializeAdyenClient')->willReturn($adyenClientMock);
-        $this->adyenHelperMock->method('initializePaymentsApi')->willReturn($checkoutServiceMock);
+
+        // Mock currency details
         $this->amountCurrencyMock->method('getCurrencyCode')->willReturn('EUR');
         $this->amountCurrencyMock->method('getAmount')->willReturn($amountValue);
         $this->chargedCurrencyMock->method('getQuoteAmountCurrency')->willReturn($this->amountCurrencyMock);
+
+        // Mock billing address retrieval
         $this->billingAddressMock->expects($this->once())
             ->method('getCountryId')
             ->willReturn('NL');
+
         $this->quoteMock
             ->method('getBillingAddress')
             ->willReturn($this->billingAddressMock);
-        // Simulate successful API call
-        $checkoutServiceMock->expects($this->once())
+
+        // Mock checkoutSession->getQuote()
+        $this->checkoutSession->expects($this->once())
+            ->method('getQuote')
+            ->willReturn($this->quoteMock);
+
+        // Mock getPayment()->getAdditionalInformation('shopper_conversion_id')
+        $paymentMock = $this->createMock(\Magento\Quote\Model\Quote\Payment::class);
+        $paymentMock->expects($this->once())
+            ->method('getAdditionalInformation')
+            ->with('shopper_conversion_id')
+            ->willReturn($shopperConversionId);
+
+        // Mock getPayment() from quote
+        $this->quoteMock->expects($this->once())
+            ->method('getPayment')
+            ->willReturn($paymentMock);
+
+        // Simulate successful API call but return empty response
+        $checkoutServiceMock
             ->method('paymentMethods')
             ->willThrowException(new AdyenException("The Payment methods response is empty check your Adyen configuration in Magento."));
-
         $fetchPaymentMethodsMethod = $this->getPrivateMethod(
             PaymentMethods::class,
             'fetchPaymentMethods'
         );
 
+        // Create PaymentMethods object with mocked dependencies
         $paymentMethods = $this->objectManager->getObject(
             PaymentMethods::class,
             [
                 'quote' => $this->quoteMock,
                 'configHelper' => $this->configHelperMock,
                 'chargedCurrency' => $this->chargedCurrencyMock,
-                'adyenHelper' => $this->adyenHelperMock
+                'adyenHelper' => $this->adyenHelperMock,
+                'checkoutSession' => $this->checkoutSession
             ]
         );
 
-        // Execute method of the tested class
+        // Execute the method being tested
         $result = $fetchPaymentMethodsMethod->invoke($paymentMethods, null, null);
 
-        // Assert conditions
+        // Assert that the response is an empty JSON array
         $this->assertEquals(json_encode([]), $result);
     }
 
+
     public function testSuccessfulRetrievalOfPaymentMethods()
     {
         $expectedResult = [
@@ -490,6 +533,11 @@ public function testSuccessfulRetrievalOfPaymentMethods()
         $quoteId = 1;
         $storeId = 1;
         $amountValue = '100';
+        $shopperConversionId = '59e9d008-b427-47ae-b9b9-95c43d4ac3f6';
+        $this->quoteMock = $this->getMockBuilder(Quote::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['getPayment', 'getStore', 'getBillingAddress'])
+            ->getMock();
 
         $requestParams = [
             "channel" => "Web",
@@ -500,7 +548,8 @@ public function testSuccessfulRetrievalOfPaymentMethods()
             "amount" => [
                 "currency" => 'EUR',
                 "value" => $amountValue
-            ]
+            ],
+            'shopperConversionId' => $shopperConversionId
         ];
 
         $paymentMethodsExtraDetails['type']['configuration'] = [
@@ -558,6 +607,23 @@ public function testSuccessfulRetrievalOfPaymentMethods()
         $this->adyenHelperMock->expects($this->once())
             ->method('logResponse');
 
+
+        // Mock checkoutSession->getQuote()
+        $this->checkoutSession->expects($this->once())
+            ->method('getQuote')
+            ->willReturn($this->quoteMock);
+
+        $paymentMock = $this->createMock(\Magento\Quote\Model\Quote\Payment::class);
+        $paymentMock->expects($this->once())
+            ->method('getAdditionalInformation')
+            ->with('shopper_conversion_id')
+            ->willReturn($shopperConversionId);
+
+        // Mock getPayment() from quote
+        $this->quoteMock->expects($this->once())
+            ->method('getPayment')
+            ->willReturn($paymentMock);
+
         $paymentMethods = $this->objectManager->getObject(
             PaymentMethods::class,
             [
@@ -566,6 +632,7 @@ public function testSuccessfulRetrievalOfPaymentMethods()
                 'chargedCurrency' => $this->chargedCurrencyMock,
                 'adyenHelper' => $this->adyenHelperMock,
                 'paymentMethods' => $paymentMethodsMock,
+                'checkoutSession' => $this->checkoutSession
             ]
         );
         $fetchPaymentMethodsMethod = $this->getPrivateMethod(
@@ -575,6 +642,7 @@ public function testSuccessfulRetrievalOfPaymentMethods()
         $result = $fetchPaymentMethodsMethod->invoke($paymentMethods, 'NL', 'nl_NL');
 
         $this->assertJson($result);
+
     }
 
     public function testGetCurrentCountryCodeWithBillingAddressSet()
@@ -1091,6 +1159,7 @@ public function testGetPaymentMethodsRequest()
         $country = 'NL';
         $amountValue = 100;
         $currencyCode = 'EUR';
+        $shopperConversionId = '59e9d008-b427-47ae-b9b9-95c43d4ac3f6';
         $this->amountCurrencyMock->method('getCurrencyCode')->willReturn('EUR');
         $this->amountCurrencyMock->method('getAmount')->willReturn($amountValue);
         $this->chargedCurrencyMock->method('getQuoteAmountCurrency')->willReturn($this->amountCurrencyMock);
@@ -1102,9 +1171,32 @@ public function testGetPaymentMethodsRequest()
             "merchantAccount" => $merchantAccount,
             "countryCode" => $country,
             "shopperLocale" => $shopperLocale,
-            "amount" => ["currency" => $currencyCode]
+            "amount" => ["currency" => $currencyCode],
+            "shopperConversionId" => "59e9d008-b427-47ae-b9b9-95c43d4ac3f6"
         ];
 
+        $this->quoteMock = $this->getMockBuilder(Quote::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['getPayment', 'getStore', 'getBillingAddress'])
+            ->getMock();
+
+        // Mock checkoutSession->getQuote()
+        $this->checkoutSession->expects($this->once())
+            ->method('getQuote')
+            ->willReturn($this->quoteMock);
+
+        // Mock getPayment()->getAdditionalInformation('shopper_conversion_id')
+        $paymentMock = $this->createMock(\Magento\Quote\Model\Quote\Payment::class);
+        $paymentMock->expects($this->once())
+            ->method('getAdditionalInformation')
+            ->with('shopper_conversion_id')
+            ->willReturn($shopperConversionId);
+
+        // Mock getPayment() from quote
+        $this->quoteMock->expects($this->once())
+            ->method('getPayment')
+            ->willReturn($paymentMock);
+
         $paymentMethods = $this->objectManager->getObject(
             PaymentMethods::class,
             [
@@ -1112,6 +1204,7 @@ public function testGetPaymentMethodsRequest()
                 'configHelper' => $this->configHelperMock,
                 'chargedCurrency' => $this->chargedCurrencyMock,
                 'adyenHelper' => $this->adyenHelperMock,
+                'checkoutSession' => $this->checkoutSession
             ]
         );