diff --git a/composer.json b/composer.json
index 7e30bcd0..fc972a9c 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "buckaroo/sdk",
     "description": "Buckaroo payment SDK",
     "license": "MIT",
-    "version": "1.9.0",
+    "version": "1.9.1",
     "type": "library",
     "require": {
         "php": ">=7.4|^8.0",
diff --git a/example/additional_services/getActiveSubscriptions.php b/example/additional_services/getActiveSubscriptions.php
new file mode 100644
index 00000000..e7d2d8e6
--- /dev/null
+++ b/example/additional_services/getActiveSubscriptions.php
@@ -0,0 +1,17 @@
+<?php
+
+require_once __DIR__ . '/../bootstrap.php';
+
+use Buckaroo\BuckarooClient;
+
+$buckaroo = new BuckarooClient($_ENV['BPE_WEBSITE_KEY'], $_ENV['BPE_SECRET_KEY']);
+
+try {
+    foreach ($buckaroo->getActiveSubscriptions() as $subscription) {
+        $availableCurrencies = implode(",", $subscription['currencies']);
+        echo "serviceCode: " . $subscription['serviceCode'] . "\n";
+        echo  "- available currencies: " . $availableCurrencies . "\n";
+    }
+} catch (\Throwable $th) {
+    var_dump($th);
+}
diff --git a/example/transactions/externalPayment.php b/example/transactions/externalPayment.php
new file mode 100644
index 00000000..85a881fa
--- /dev/null
+++ b/example/transactions/externalPayment.php
@@ -0,0 +1,19 @@
+<?php
+
+require_once __DIR__.'/../bootstrap.php';
+
+use Buckaroo\BuckarooClient;
+
+$buckaroo = new BuckarooClient($_ENV['BPE_WEBSITE_KEY'], $_ENV['BPE_SECRET_KEY']);
+
+$response = $buckaroo->method('externalPayment')->pay([
+    'invoice' => uniqid(),
+    'amountDebit' => 10.10,
+    'channel' => 'BackOffice'
+]);
+
+$buckaroo->method('externalPayment')->refund([
+    'amountCredit' => 10,
+    'invoice' => 'testinvoice 123',
+    'originalTransactionKey' => $response->getTransactionKey(),
+]);
\ No newline at end of file
diff --git a/src/BuckarooClient.php b/src/BuckarooClient.php
index ad682cc4..e86c2577 100644
--- a/src/BuckarooClient.php
+++ b/src/BuckarooClient.php
@@ -27,6 +27,7 @@
 use Buckaroo\Handlers\Logging\Observer as LoggingObserver;
 use Buckaroo\PaymentMethods\BatchTransactions;
 use Buckaroo\PaymentMethods\PaymentFacade;
+use Buckaroo\Services\ActiveSubscriptions;
 use Buckaroo\Services\TransactionService;
 use Buckaroo\Transaction\Client;
 
@@ -73,6 +74,12 @@ public function method(string $method = null): PaymentFacade
         return new PaymentFacade($this->client, $method);
     }
 
+
+    public function getActiveSubscriptions(): array
+    {
+        return (new ActiveSubscriptions($this->client))->get();
+    }
+
     /**
      * @param array $transactions
      * @return BatchTransactions
diff --git a/src/PaymentMethods/ExternalPayment/ExternalPayment.php b/src/PaymentMethods/ExternalPayment/ExternalPayment.php
new file mode 100644
index 00000000..f10e6d07
--- /dev/null
+++ b/src/PaymentMethods/ExternalPayment/ExternalPayment.php
@@ -0,0 +1,30 @@
+<?php
+/*
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the MIT License
+ * It is available through the world-wide-web at this URL:
+ * https://tldrlegal.com/license/mit-license
+ * If you are unable to obtain it through the world-wide-web, please send an email
+ * to support@buckaroo.nl so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this module to newer
+ * versions in the future. If you wish to customize this module for your
+ * needs please contact support@buckaroo.nl for more information.
+ *
+ * @copyright Copyright (c) Buckaroo B.V.
+ * @license   https://tldrlegal.com/license/mit-license
+ */
+
+declare(strict_types=1);
+
+namespace Buckaroo\PaymentMethods\ExternalPayment;
+
+use Buckaroo\PaymentMethods\PayablePaymentMethod;
+
+class ExternalPayment extends PayablePaymentMethod
+{
+    protected string $paymentName = 'ExternalPayment';
+}
diff --git a/src/PaymentMethods/PaymentMethodFactory.php b/src/PaymentMethods/PaymentMethodFactory.php
index c675167a..4fe4c0ad 100644
--- a/src/PaymentMethods/PaymentMethodFactory.php
+++ b/src/PaymentMethods/PaymentMethodFactory.php
@@ -20,51 +20,52 @@
 
 namespace Buckaroo\PaymentMethods;
 
+use Buckaroo\Transaction\Client;
+use Buckaroo\PaymentMethods\EPS\EPS;
+use Buckaroo\PaymentMethods\In3\In3;
+use Buckaroo\PaymentMethods\KBC\KBC;
+use Buckaroo\PaymentMethods\iDin\iDin;
+use Buckaroo\PaymentMethods\SEPA\SEPA;
+use Buckaroo\PaymentMethods\iDeal\iDeal;
+use Buckaroo\PaymentMethods\MBWay\MBWay;
+use Buckaroo\PaymentMethods\Tinka\Tinka;
 use Buckaroo\Exceptions\BuckarooException;
-use Buckaroo\PaymentMethods\Afterpay\Afterpay;
-use Buckaroo\PaymentMethods\AfterpayDigiAccept\AfterpayDigiAccept;
 use Buckaroo\PaymentMethods\Alipay\Alipay;
-use Buckaroo\PaymentMethods\ApplePay\ApplePay;
-use Buckaroo\PaymentMethods\Bancontact\Bancontact;
-use Buckaroo\PaymentMethods\BankTransfer\BankTransfer;
+use Buckaroo\PaymentMethods\In3Old\In3Old;
+use Buckaroo\PaymentMethods\Paypal\Paypal;
+use Buckaroo\PaymentMethods\Sofort\Sofort;
+use Buckaroo\PaymentMethods\Thunes\Thunes;
 use Buckaroo\PaymentMethods\Belfius\Belfius;
 use Buckaroo\PaymentMethods\Billink\Billink;
-use Buckaroo\PaymentMethods\BuckarooVoucher\BuckarooVoucher;
-use Buckaroo\PaymentMethods\BuckarooWallet\BuckarooWallet;
-use Buckaroo\PaymentMethods\CreditCard\CreditCard;
-use Buckaroo\PaymentMethods\CreditClick\CreditClick;
-use Buckaroo\PaymentMethods\CreditManagement\CreditManagement;
-use Buckaroo\PaymentMethods\Emandates\Emandates;
-use Buckaroo\PaymentMethods\EPS\EPS;
-use Buckaroo\PaymentMethods\MBWay\MBWay;
-use Buckaroo\PaymentMethods\GiftCard\GiftCard;
 use Buckaroo\PaymentMethods\Giropay\Giropay;
-use Buckaroo\PaymentMethods\iDeal\iDeal;
 use Buckaroo\PaymentMethods\iDealQR\iDealQR;
-use Buckaroo\PaymentMethods\iDin\iDin;
-use Buckaroo\PaymentMethods\In3\In3;
-use Buckaroo\PaymentMethods\In3Old\In3Old;
-use Buckaroo\PaymentMethods\KBC\KBC;
+use Buckaroo\PaymentMethods\Surepay\Surepay;
+use Buckaroo\PaymentMethods\Trustly\Trustly;
+use Buckaroo\PaymentMethods\Afterpay\Afterpay;
+use Buckaroo\PaymentMethods\ApplePay\ApplePay;
+use Buckaroo\PaymentMethods\GiftCard\GiftCard;
 use Buckaroo\PaymentMethods\KlarnaKP\KlarnaKP;
+use Buckaroo\PaymentMethods\Payconiq\Payconiq;
+use Buckaroo\PaymentMethods\Emandates\Emandates;
 use Buckaroo\PaymentMethods\KlarnaPay\KlarnaPay;
-use Buckaroo\PaymentMethods\Marketplaces\Marketplaces;
+use Buckaroo\PaymentMethods\WeChatPay\WeChatPay;
+use Buckaroo\PaymentMethods\Bancontact\Bancontact;
+use Buckaroo\PaymentMethods\CreditCard\CreditCard;
 use Buckaroo\PaymentMethods\Multibanco\Multibanco;
-use Buckaroo\PaymentMethods\NoServiceSpecifiedPayment\NoServiceSpecifiedPayment;
-use Buckaroo\PaymentMethods\Payconiq\Payconiq;
-use Buckaroo\PaymentMethods\PaymentInitiation\PaymentInitiation;
-use Buckaroo\PaymentMethods\Paypal\Paypal;
+use Buckaroo\PaymentMethods\Przelewy24\Przelewy24;
+use Buckaroo\PaymentMethods\CreditClick\CreditClick;
 use Buckaroo\PaymentMethods\PayPerEmail\PayPerEmail;
 use Buckaroo\PaymentMethods\PointOfSale\PointOfSale;
-use Buckaroo\PaymentMethods\Przelewy24\Przelewy24;
-use Buckaroo\PaymentMethods\SEPA\SEPA;
-use Buckaroo\PaymentMethods\Sofort\Sofort;
+use Buckaroo\PaymentMethods\BankTransfer\BankTransfer;
+use Buckaroo\PaymentMethods\Marketplaces\Marketplaces;
 use Buckaroo\PaymentMethods\Subscriptions\Subscriptions;
-use Buckaroo\PaymentMethods\Surepay\Surepay;
-use Buckaroo\PaymentMethods\Thunes\Thunes;
-use Buckaroo\PaymentMethods\Tinka\Tinka;
-use Buckaroo\PaymentMethods\Trustly\Trustly;
-use Buckaroo\PaymentMethods\WeChatPay\WeChatPay;
-use Buckaroo\Transaction\Client;
+use Buckaroo\PaymentMethods\BuckarooWallet\BuckarooWallet;
+use Buckaroo\PaymentMethods\BuckarooVoucher\BuckarooVoucher;
+use Buckaroo\PaymentMethods\ExternalPayment\ExternalPayment;
+use Buckaroo\PaymentMethods\CreditManagement\CreditManagement;
+use Buckaroo\PaymentMethods\PaymentInitiation\PaymentInitiation;
+use Buckaroo\PaymentMethods\AfterpayDigiAccept\AfterpayDigiAccept;
+use Buckaroo\PaymentMethods\NoServiceSpecifiedPayment\NoServiceSpecifiedPayment;
 
 class PaymentMethodFactory
 {
@@ -107,6 +108,7 @@ class PaymentMethodFactory
         PayPerEmail::class => ['payperemail'],
         PaymentInitiation::class => ['paymentinitiation','paybybank'],
         EPS::class => ['eps'],
+        ExternalPayment::class => ['externalpayment'],
         Emandates::class => ['emandates'],
         Sofort::class => ['sofort', 'sofortueberweisung'],
         Tinka::class => ['tinka'],
diff --git a/src/Services/ActiveSubscriptions.php b/src/Services/ActiveSubscriptions.php
new file mode 100644
index 00000000..e5fb4f84
--- /dev/null
+++ b/src/Services/ActiveSubscriptions.php
@@ -0,0 +1,120 @@
+<?php
+/*
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the MIT License
+ * It is available through the world-wide-web at this URL:
+ * https://tldrlegal.com/license/mit-license
+ * If you are unable to obtain it through the world-wide-web, please send an email
+ * to support@buckaroo.nl so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this module to newer
+ * versions in the future. If you wish to customize this module for your
+ * needs please contact support@buckaroo.nl for more information.
+ *
+ * @copyright Copyright (c) Buckaroo B.V.
+ * @license   https://tldrlegal.com/license/mit-license
+ */
+
+namespace Buckaroo\Services;
+
+use Exception;
+use SimpleXMLElement;
+use Buckaroo\Models\ServiceList;
+use Buckaroo\Transaction\Client;
+use Buckaroo\Transaction\Request\TransactionRequest;
+
+class ActiveSubscriptions
+{
+
+    private const SERVICE_CODE_AND_ACTION = 'GetActiveSubscriptions';
+
+    private const VERSION_ZERO = 0;
+
+    private const SERVICE_PARAM_KEY = 'activesubscriptions';
+
+    private Client $client;
+
+    public function __construct(Client $client)
+    {
+        $this->client = $client;
+    }
+
+    public function get(): array
+    {
+        try {
+            $xmlString = $this->client
+                ->dataRequest($this->buildTransaction())
+                ->getServiceParameters()[self::SERVICE_PARAM_KEY] ?? null;
+
+            if (!is_string($xmlString)) {
+                return [];
+            }
+
+            $xml = new SimpleXMLElement($xmlString, LIBXML_NOCDATA);
+
+            return $this->format(
+                $xml->xpath('/ArrayOfServiceCurrencies/ServiceCurrencies')
+            );
+        } catch (Exception $e) {
+            return [];
+        }
+    }
+
+    private function buildTransaction(): TransactionRequest
+    {
+        $transaction = new TransactionRequest();
+
+        $transaction
+            ->getServices()
+            ->pushServiceList(
+                new ServiceList(
+                    self::SERVICE_CODE_AND_ACTION,
+                    self::VERSION_ZERO,
+                    self::SERVICE_CODE_AND_ACTION
+                )
+            );
+        return $transaction;
+    }
+
+    private function format($data): array
+    {
+        $decoded =  json_decode(json_encode($data), true);
+        if (!is_array($decoded)) {
+            return [];
+        }
+
+        $formated = [];
+        foreach ($decoded as $subscription) {
+            $formatedSubscription = [];
+            foreach ($subscription as $key => $subscriptionData) {
+                $camelKey = lcfirst($key);
+                $formatedSubscription[$camelKey] = $this->formatValue($camelKey, $subscriptionData);
+            }
+            $formated[] = $formatedSubscription;
+        }
+        return $formated;
+    }
+
+    /**
+     * Format value for currency
+     *
+     * @param string $key
+     * @param string|array $value
+     *
+     * @return string|array
+     */
+    private function formatValue($key, $value)
+    {
+        if ($key === 'currencies') {
+            $value = $value["string"];
+            if (is_string($value)) {
+                $value = [$value];
+            }
+        }
+
+        return $value;
+    }
+}
diff --git a/src/Transaction/Client.php b/src/Transaction/Client.php
index b3116fac..a1c4d878 100644
--- a/src/Transaction/Client.php
+++ b/src/Transaction/Client.php
@@ -31,7 +31,7 @@
 use Buckaroo\Services\TransactionHeaders\DefaultHeader;
 use Buckaroo\Services\TransactionHeaders\HmacHeader;
 use Buckaroo\Services\TransactionHeaders\SoftwareHeader;
-use Buckaroo\Transaction\Request\HttpClient\HttpClientGuzzle;
+use Buckaroo\Transaction\Request\HttpClient\HttpClientFactory;
 use Buckaroo\Transaction\Request\HttpClient\HttpClientInterface;
 use Buckaroo\Transaction\Request\Request;
 use Buckaroo\Transaction\Response\Response;
@@ -43,7 +43,7 @@ class Client
     private const METHOD_POST = 'POST';
 
     /**
-     * @var HttpClientInterface|HttpClientGuzzle
+     * @var HttpClientInterface
      */
     protected HttpClientInterface $httpClient;
     /**
@@ -61,7 +61,7 @@ class Client
     public function __construct(?Config $config)
     {
         $this->config = $config;
-        $this->httpClient = new HttpClientGuzzle($config->getLogger());
+        $this->httpClient = HttpClientFactory::createClient($config->getLogger());
     }
 
     /**
diff --git a/src/Transaction/Request/HttpClient/GuzzleHttpClientV5.php b/src/Transaction/Request/HttpClient/GuzzleHttpClientV5.php
new file mode 100644
index 00000000..acb11dc5
--- /dev/null
+++ b/src/Transaction/Request/HttpClient/GuzzleHttpClientV5.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace Buckaroo\Transaction\Request\HttpClient;
+
+use Buckaroo\Exceptions\BuckarooException;
+use Buckaroo\Exceptions\TransferException;
+use Buckaroo\Handlers\Logging\Subject;
+use GuzzleHttp\Client;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\GuzzleException;
+use GuzzleHttp\Exception\RequestException;
+
+class GuzzleHttpClientV5 extends HttpClientAbstract
+{
+    /**
+     * @var Subject
+     */
+    protected Subject $logger;
+    protected ClientInterface $httpClient;
+
+    public function __construct(Subject $logger)
+    {
+        parent::__construct($logger);
+        $this->logger = $logger;
+
+        $this->httpClient = new Client([
+            'timeout' => self::TIMEOUT,
+            'connect_timeout' => self::CONNECT_TIMEOUT,
+        ]);
+    }
+
+    /**
+     * @param string $url
+     * @param array $headers
+     * @param string $method
+     * @param string|null $data
+     * @return array|mixed
+     * @throws TransferException
+     * @throws BuckarooException|GuzzleException
+     */
+
+    public function call(string $url, array $headers, string $method, string $data = null)
+    {
+        $headers = $this->convertHeadersFormat($headers);
+
+        $request = $this->httpClient->createRequest($method, $url, [
+            'headers' => $headers,
+            'body' => $data,
+        ]);
+
+        try
+        {
+            $response = $this->httpClient->send($request);
+
+            $result = (string) $response->getBody();
+
+            $this->logger->info('RESPONSE HEADERS: ' . json_encode($response->getHeaders()));
+            $this->logger->info('RESPONSE BODY: ' . $response->getBody());
+        } catch (RequestException $e) {
+            throw new TransferException($this->logger, "Transfer failed", 0, $e);
+        }
+
+        $result = $this->getDecodedResult($response, $result);
+
+        return [
+            $response,
+            $result,
+        ];
+    }
+}
diff --git a/src/Transaction/Request/HttpClient/HttpClientGuzzle.php b/src/Transaction/Request/HttpClient/GuzzleHttpClientV7.php
similarity index 67%
rename from src/Transaction/Request/HttpClient/HttpClientGuzzle.php
rename to src/Transaction/Request/HttpClient/GuzzleHttpClientV7.php
index d15a2fd7..015b4e09 100644
--- a/src/Transaction/Request/HttpClient/HttpClientGuzzle.php
+++ b/src/Transaction/Request/HttpClient/GuzzleHttpClientV7.php
@@ -1,27 +1,8 @@
 <?php
-/*
- * NOTICE OF LICENSE
- *
- * This source file is subject to the MIT License
- * It is available through the world-wide-web at this URL:
- * https://tldrlegal.com/license/mit-license
- * If you are unable to obtain it through the world-wide-web, please send an email
- * to support@buckaroo.nl so we can send you a copy immediately.
- *
- * DISCLAIMER
- *
- * Do not edit or add to this file if you wish to upgrade this module to newer
- * versions in the future. If you wish to customize this module for your
- * needs please contact support@buckaroo.nl for more information.
- *
- * @copyright Copyright (c) Buckaroo B.V.
- * @license   https://tldrlegal.com/license/mit-license
- */
-
-declare(strict_types=1);
 
 namespace Buckaroo\Transaction\Request\HttpClient;
 
+use Buckaroo\Exceptions\BuckarooException;
 use Buckaroo\Exceptions\TransferException;
 use Buckaroo\Handlers\Logging\Subject;
 use GuzzleHttp\Client;
@@ -30,7 +11,7 @@
 use GuzzleHttp\Psr7\Request;
 use GuzzleHttp\RequestOptions;
 
-class HttpClientGuzzle extends HttpClientAbstract
+class GuzzleHttpClientV7 extends HttpClientAbstract
 {
     /**
      * @var Subject
@@ -61,7 +42,7 @@ public function __construct(Subject $logger)
      * @param string|null $data
      * @return array|mixed
      * @throws TransferException
-     * @throws \Buckaroo\Exceptions\BuckarooException
+     * @throws BuckarooException
      */
     public function call(string $url, array $headers, string $method, string $data = null)
     {
@@ -77,8 +58,7 @@ public function call(string $url, array $headers, string $method, string $data =
 
             $this->logger->info('RESPONSE HEADERS: ' . json_encode($response->getHeaders()));
             $this->logger->info('RESPONSE BODY: ' . $response->getBody());
-        } catch (GuzzleException $e)
-        {
+        } catch (GuzzleException $e) {
             throw new TransferException($this->logger, "Transfer failed", 0, $e);
         }
 
diff --git a/src/Transaction/Request/HttpClient/HttpClientFactory.php b/src/Transaction/Request/HttpClient/HttpClientFactory.php
new file mode 100644
index 00000000..1c7a1220
--- /dev/null
+++ b/src/Transaction/Request/HttpClient/HttpClientFactory.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Buckaroo\Transaction\Request\HttpClient;
+
+use Buckaroo\Handlers\Logging\Subject;
+use Composer\InstalledVersions;
+
+class HttpClientFactory
+{
+    public static function createClient(Subject $logger)
+    {
+        // Detect the installed GuzzleHttp version
+        $versionString  = InstalledVersions::getVersion('guzzlehttp/guzzle');
+        // Extract the major version number
+        $majorVersion = (int) explode('.', $versionString)[0];
+
+        // Instantiate the appropriate client based on the major version
+        if ($majorVersion === 5) {
+            return new GuzzleHttpClientV5($logger);
+        }
+        return new GuzzleHttpClientV7($logger);
+    }
+}
diff --git a/tests/Buckaroo/GetActiveSubscription.php b/tests/Buckaroo/GetActiveSubscription.php
new file mode 100644
index 00000000..cc83d082
--- /dev/null
+++ b/tests/Buckaroo/GetActiveSubscription.php
@@ -0,0 +1,38 @@
+<?php
+/*
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the MIT License
+ * It is available through the world-wide-web at this URL:
+ * https://tldrlegal.com/license/mit-license
+ * If you are unable to obtain it through the world-wide-web, please send an email
+ * to support@buckaroo.nl so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this module to newer
+ * versions in the future. If you wish to customize this module for your
+ * needs please contact support@buckaroo.nl for more information.
+ *
+ * @copyright Copyright (c) Buckaroo B.V.
+ * @license   https://tldrlegal.com/license/mit-license
+ */
+
+namespace Tests\Buckaroo;
+
+use Tests\Buckaroo\BuckarooTestCase;
+
+class GetActiveSubscription extends BuckarooTestCase
+{
+    /**
+     * @return void
+     * @test
+     */
+    public function it_gets_the_active_subscriptions()
+    {
+        $response = $this->buckaroo->getActiveSubscriptions();
+        $this->assertIsArray($response);
+        $this->assertArrayHasKey('serviceCode', $response[0]);
+        $this->assertArrayHasKey('currencies', $response[0]);
+    }
+}
diff --git a/tests/Buckaroo/Payments/ExternalPaymentTest.php b/tests/Buckaroo/Payments/ExternalPaymentTest.php
new file mode 100644
index 00000000..5b0338c3
--- /dev/null
+++ b/tests/Buckaroo/Payments/ExternalPaymentTest.php
@@ -0,0 +1,56 @@
+<?php
+/*
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the MIT License
+ * It is available through the world-wide-web at this URL:
+ * https://tldrlegal.com/license/mit-license
+ * If you are unable to obtain it through the world-wide-web, please send an email
+ * to support@buckaroo.nl so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade this module to newer
+ * versions in the future. If you wish to customize this module for your
+ * needs please contact support@buckaroo.nl for more information.
+ *
+ * @copyright Copyright (c) Buckaroo B.V.
+ * @license   https://tldrlegal.com/license/mit-license
+ */
+
+namespace Tests\Buckaroo\Payments;
+
+use Tests\Buckaroo\BuckarooTestCase;
+
+class ExternalPaymentTest extends BuckarooTestCase
+{
+    /**
+     * @return void
+     * @test
+     */
+    public function it_creates_a_external_payment()
+    {
+        $response = $this->buckaroo->method('externalPayment')->pay([
+            'invoice' => uniqid(),
+            'amountDebit' => 11.10,
+            'channel' => 'BACKOFFICE'
+        ]);
+
+        $this->assertTrue($response->isSuccess());
+    }
+
+    /**
+     * @test
+     */
+    public function it_creates_a_external_refund()
+    {
+        $response = $this->buckaroo->method('externalPayment')->refund([
+            'amountCredit' => 10,
+            'invoice' => 'testinvoice 123',
+            'description' => 'refund',
+            'originalTransactionKey' => '2D04704995B74D679AACC59F87XXXXXX',
+        ]);
+
+        $this->assertTrue($response->isFailed());
+    }
+}