diff --git a/src/Exception/ApiException.php b/src/Exception/ApiException.php
index bc7f41fe..0a487d33 100644
--- a/src/Exception/ApiException.php
+++ b/src/Exception/ApiException.php
@@ -12,17 +12,32 @@ class ApiException extends Exception
      */
     private $responseCode;
 
+    /**
+     * @var string
+     */
+    private $responseId;
+
     /**
      * @param string $message
      * @param int $responseCode
+     * @param string $responseId
      */
-    public function __construct(string $message, int $responseCode)
+    public function __construct(string $message, int $responseCode, string $responseId)
     {
         $this->responseCode = $responseCode;
+        $this->responseId = $responseId;
 
         parent::__construct($message);
     }
 
+    /**
+     * @return string
+     */
+    public function getResponseId(): string
+    {
+        return $this->responseId;
+    }
+
     /**
      * @return int
      */
diff --git a/src/Exception/ExceptionFactory.php b/src/Exception/ExceptionFactory.php
index c7cf7d3d..8327bfd6 100644
--- a/src/Exception/ExceptionFactory.php
+++ b/src/Exception/ExceptionFactory.php
@@ -20,7 +20,13 @@ class ExceptionFactory
      * Formatting constants
      */
     const FORMAT_RESPONSE_CODE_LINE = 'HTTP Response Code: %s';
-    const GLUE_ERROR_MESSAGES = "\n";
+    const FORMAT_RESPONSE_ID = 'The response id to help bunq debug: %s';
+    const FORMAT_ERROR_MESSAGE_LINE = 'Error message: %s';
+
+    /**
+     * String separator constants
+     */
+    const SEPARATOR_ERROR_MESSAGES = "\n";
 
     /**
      * The first item index in an array.
@@ -28,56 +34,68 @@ class ExceptionFactory
     const INDEX_FIRST = 0;
 
     /**
-     * @param string[] $messages
+     * @param string[] $allMessage
      * @param int $responseCode
+     * @param string $responseId
      *
      * @return ApiException
      */
-    public static function createExceptionForResponse(array $messages, int $responseCode): ApiException
-    {
-        $errorMessage = static::generateErrorMessage($responseCode, $messages);
+    public static function createExceptionForResponse(
+        array $allMessage,
+        int $responseCode,
+        string $responseId
+    ): ApiException {
+        $errorMessage = static::generateErrorMessage($responseCode, $allMessage, $responseId);
 
-        switch ($responseCode)
-        {
+        switch ($responseCode) {
             case self::HTTP_RESPONSE_CODE_BAD_REQUEST:
-                return new BadRequestException($errorMessage, $responseCode);
+                return new BadRequestException($errorMessage, $responseCode, $responseId);
             case self::HTTP_RESPONSE_CODE_UNAUTHORIZED:
-                return new UnauthorizedException($errorMessage, $responseCode);
+                return new UnauthorizedException($errorMessage, $responseCode, $responseId);
             case self::HTTP_RESPONSE_CODE_FORBIDDEN:
-                return new ForbiddenException($errorMessage, $responseCode);
+                return new ForbiddenException($errorMessage, $responseCode, $responseId);
             case self::HTTP_RESPONSE_CODE_NOT_FOUND:
-                return new NotFoundException($errorMessage, $responseCode);
+                return new NotFoundException($errorMessage, $responseCode, $responseId);
             case self::HTTP_RESPONSE_CODE_METHOD_NOT_ALLOWED:
-                return new MethodNotAllowedException($errorMessage, $responseCode);
+                return new MethodNotAllowedException($errorMessage, $responseCode, $responseId);
             case self::HTTP_RESPONSE_CODE_TOO_MANY_REQUESTS:
-                return new TooManyRequestsException($errorMessage, $responseCode);
+                return new TooManyRequestsException($errorMessage, $responseCode, $responseId);
             case self::HTTP_RESPONSE_CODE_INTERNAL_SERVER_ERROR:
-                return new PleaseContactBunqException($errorMessage, $responseCode);
+                return new PleaseContactBunqException($errorMessage, $responseCode, $responseId);
             default:
-                return new UnknownApiErrorException($errorMessage, $responseCode);
+                return new UnknownApiErrorException($errorMessage, $responseCode, $responseId);
         }
     }
 
     /**
      * @param int $responseCode
-     * @param string[] $messages
+     * @param string[] $allMessage
+     * @param string $responseId
      *
      * @return string
      */
-    private static function generateErrorMessage(int $responseCode, array $messages): string
-    {
+    private static function generateErrorMessage(
+        int $responseCode,
+        array $allMessage,
+        string $responseId
+    ): string {
         $lineResponseCode = sprintf(self::FORMAT_RESPONSE_CODE_LINE, $responseCode);
+        $lineResponseId = sprintf(self::FORMAT_RESPONSE_ID, $responseId);
+        $lineErrorMessage = sprintf(
+            self::FORMAT_ERROR_MESSAGE_LINE,
+            implode($allMessage)
+        );
 
-        return static::glueMessages(array_merge([$lineResponseCode], $messages));
+        return static::glueAllMessage([$lineResponseCode, $lineResponseId, $lineErrorMessage]);
     }
 
     /**
-     * @param string[] $messages
+     * @param string[] $allMessage
      *
      * @return string
      */
-    private static function glueMessages(array $messages): string
+    private static function glueAllMessage(array $allMessage): string
     {
-        return implode(self::GLUE_ERROR_MESSAGES, $messages);
+        return implode(self::SEPARATOR_ERROR_MESSAGES, $allMessage);
     }
 }
diff --git a/src/Http/ApiClient.php b/src/Http/ApiClient.php
index 1060f534..ac4729a7 100644
--- a/src/Http/ApiClient.php
+++ b/src/Http/ApiClient.php
@@ -13,7 +13,6 @@
 use GuzzleHttp\Client;
 use GuzzleHttp\HandlerStack;
 use GuzzleHttp\Psr7\Uri;
-use phpDocumentor\Reflection\Types\Self_;
 use Psr\Http\Message\ResponseInterface;
 
 /**
diff --git a/src/Http/Handler/ResponseHandlerError.php b/src/Http/Handler/ResponseHandlerError.php
index 8f9e356a..28ff04d8 100644
--- a/src/Http/Handler/ResponseHandlerError.php
+++ b/src/Http/Handler/ResponseHandlerError.php
@@ -3,6 +3,7 @@
 namespace bunq\Http\Handler;
 
 use bunq\Exception\ApiException;
+use bunq\Exception\BunqException;
 use bunq\Exception\ExceptionFactory;
 use Psr\Http\Message\ResponseInterface;
 
@@ -10,17 +11,34 @@
  */
 class ResponseHandlerError extends ResponseHandlerBase
 {
+    /**
+     * Error constants.
+     */
+    const ERROR_COULD_NOT_DETERMINE_RESPONSE_ID_HEADER =
+        'The response header "X-Bunq-Client-Response-Id" or "x-bunq-client-response-id" could not be found.';
+
     /**
      * Field constants.
      */
     const FIELD_ERROR = 'Error';
     const FIELD_ERROR_DESCRIPTION = 'error_description';
 
+    /**
+     * Header constants.
+     */
+    const HEADER_BUNQ_CLIENT_RESPONSE_ID_UPPER_CASED = 'X-Bunq-Client-Response-Id';
+    const HEADER_BUNQ_CLIENT_RESPONSE_ID_LOWER_CASED = 'x-bunq-client-response-id';
+
     /**
      * Http status code constants.
      */
     const STATUS_CODE_OK = 200;
 
+    /**
+     * The index of the first item in an array.
+     */
+    const INDEX_FIRST = 0;
+
     /**
      * @param ResponseInterface $response
      *
@@ -29,10 +47,11 @@ class ResponseHandlerError extends ResponseHandlerBase
      */
     public function execute(ResponseInterface $response): ResponseInterface
     {
-        if ($response->getStatusCode() !== self::STATUS_CODE_OK){
+        if ($response->getStatusCode() !== self::STATUS_CODE_OK) {
             throw ExceptionFactory::createExceptionForResponse(
                 $this->fetchErrorMessages($response),
-                $response->getStatusCode()
+                $response->getStatusCode(),
+                $this->getResponseId($response)
             );
         }
 
@@ -49,9 +68,9 @@ private function fetchErrorMessages(ResponseInterface $response): array
         $responseBody = $response->getBody();
         $responseBodyInJson = json_decode($responseBody, true);
 
-        if ($responseBodyInJson !== false){
-            return $this->fetchErrorDescriptions($responseBodyInJson);
-        }else{
+        if ($responseBodyInJson !== false) {
+            return $this->fetchAllErrorDescription($responseBodyInJson);
+        } else {
             return [$responseBody];
         }
     }
@@ -61,15 +80,36 @@ private function fetchErrorMessages(ResponseInterface $response): array
      *
      * @return string[]
      */
-    private function fetchErrorDescriptions(array $errorArray): array
+    private function fetchAllErrorDescription(array $errorArray): array
     {
-        $errorDescriptions = [];
+        $allErrorDescription = [];
 
-        foreach ($errorArray[self::FIELD_ERROR] as $error){
+        foreach ($errorArray[self::FIELD_ERROR] as $error) {
             $description = $error[self::FIELD_ERROR_DESCRIPTION];
-            $errorDescriptions[] = $description;
+            $allErrorDescription[] = $description;
+        }
+
+        return $allErrorDescription;
+    }
+
+    /**
+     * @param ResponseInterface $response
+     *
+     * @return string
+     * @throws BunqException
+     */
+    private function getResponseId(ResponseInterface $response): string
+    {
+        $header = $response->getHeader(self::HEADER_BUNQ_CLIENT_RESPONSE_ID_UPPER_CASED);
+
+        if (empty($header)) {
+            $header = $response->getHeader(self::HEADER_BUNQ_CLIENT_RESPONSE_ID_UPPER_CASED);
+        }
+
+        if (empty($header)) {
+            throw new BunqException(self::ERROR_COULD_NOT_DETERMINE_RESPONSE_ID_HEADER);
         }
 
-        return $errorDescriptions;
+        return $header[self::INDEX_FIRST];
     }
 }
diff --git a/tests/Http/ErrorResponseIdTest.php b/tests/Http/ErrorResponseIdTest.php
new file mode 100644
index 00000000..302baa19
--- /dev/null
+++ b/tests/Http/ErrorResponseIdTest.php
@@ -0,0 +1,33 @@
+<?php
+namespace bunq\test\Http;
+
+use bunq\Exception\BadRequestException;
+use bunq\Model\Generated\Endpoint\UserPerson;
+use bunq\test\BunqSdkTestBase;
+
+/**
+ * Tests if the response id from a failed request can be retrieved successfully.
+ */
+class ErrorResponseIdTest extends BunqSdkTestBase
+{
+    /**
+     * Invalid user id to trigger BadRequestException
+     */
+    const INVALID_USER_PERSON_ID = 0;
+
+    /**
+     */
+    public function testBadRequestWitResponseId()
+    {
+        $caughtException = null;
+
+        try {
+            UserPerson::get(static::$apiContext, self::INVALID_USER_PERSON_ID);
+        } catch (BadRequestException $exception) {
+            $caughtException = $exception;
+        }
+
+        static::assertNotNull($caughtException);
+        static::assertNotNull($caughtException->getResponseId());
+    }
+}