diff --git a/src/Application/Application.php b/src/Application/Application.php
index cddd13896..41d3a05a4 100644
--- a/src/Application/Application.php
+++ b/src/Application/Application.php
@@ -106,7 +106,7 @@ public function createInitialRequest(): Request
 	{
 		$request = $this->router->match($this->httpRequest);
 		if (!$request) {
-			throw new BadRequestException('No route for HTTP request.');
+			throw new RejectRequestException('No route for HTTP request.', RejectRequestException::NO_ROUTE);
 		}
 		return $request;
 	}
@@ -123,13 +123,13 @@ public function processRequest(Request $request): void
 		$this->onRequest($this, $request);
 
 		if (!$request->isMethod($request::FORWARD) && !strcasecmp($request->getPresenterName(), (string) $this->errorPresenter)) {
-			throw new BadRequestException('Invalid request. Presenter is not achievable.');
+			throw new RejectRequestException('Invalid request. Presenter is not achievable.', RejectRequestException::WRONG_PRESENTER);
 		}
 
 		try {
 			$this->presenter = $this->presenterFactory->createPresenter($request->getPresenterName());
 		} catch (InvalidPresenterException $e) {
-			throw count($this->requests) > 1 ? $e : new BadRequestException($e->getMessage(), 0, $e);
+			throw count($this->requests) > 1 ? $e : new RejectRequestException($e->getMessage(), RejectRequestException::WRONG_PRESENTER, $e);
 		}
 		$this->onPresenter($this, $this->presenter);
 		$response = $this->presenter->run(clone $request);
diff --git a/src/Application/MicroPresenter.php b/src/Application/MicroPresenter.php
index 0a52e537e..ceae3ab74 100644
--- a/src/Application/MicroPresenter.php
+++ b/src/Application/MicroPresenter.php
@@ -83,7 +83,7 @@ public function run(Application\Request $request): Application\IResponse
 		try {
 			$params = Application\UI\ComponentReflection::combineArgs($reflection, $params);
 		} catch (Nette\InvalidArgumentException $e) {
-			$this->error($e->getMessage());
+			throw new Application\RejectRequestException($e->getMessage(), Application\RejectRequestException::WRONG_ARGUMENT);
 		}
 
 		$response = $callback(...array_values($params));
diff --git a/src/Application/UI/Component.php b/src/Application/UI/Component.php
index 96a1a15b0..f7fb25614 100644
--- a/src/Application/UI/Component.php
+++ b/src/Application/UI/Component.php
@@ -10,6 +10,7 @@
 namespace Nette\Application\UI;
 
 use Nette;
+use Nette\Application\RejectRequestException;
 
 
 /**
@@ -85,7 +86,7 @@ protected function tryCall(string $method, array $params): bool
 				try {
 					$args = $rc->combineArgs($rm, $params);
 				} catch (Nette\InvalidArgumentException $e) {
-					throw new Nette\Application\BadRequestException($e->getMessage());
+					throw new RejectRequestException($e->getMessage(), RejectRequestException::WRONG_ARGUMENT);
 				}
 				$rm->invokeArgs($this, $args);
 				return true;
@@ -125,13 +126,13 @@ public function loadState(array $params): void
 			if (isset($params[$name])) { // nulls are ignored
 				$type = gettype($meta['def']);
 				if (!$reflection->convertType($params[$name], $type)) {
-					throw new Nette\Application\BadRequestException(sprintf(
+					throw new RejectRequestException(sprintf(
 						"Value passed to persistent parameter '%s' in %s must be %s, %s given.",
 						$name,
 						$this instanceof Presenter ? 'presenter ' . $this->getName() : "component '{$this->getUniqueId()}'",
 						$type === 'NULL' ? 'scalar' : $type,
 						is_object($params[$name]) ? get_class($params[$name]) : gettype($params[$name])
-					));
+					), RejectRequestException::WRONG_ARGUMENT);
 				}
 				$this->$name = $params[$name];
 			} else {
@@ -212,13 +213,13 @@ public static function getPersistentParams(): array
 
 	/**
 	 * Calls signal handler method.
-	 * @throws BadSignalException if there is not handler method
+	 * @throws RejectRequestException if there is not handler method
 	 */
 	public function signalReceived(string $signal): void
 	{
 		if (!$this->tryCall($this->formatSignalMethod($signal), $this->params)) {
 			$class = get_class($this);
-			throw new BadSignalException("There is no handler for signal '$signal' in class $class.");
+			throw new RejectRequestException("There is no handler for signal '$signal' in class $class.", RejectRequestException::WRONG_SIGNAL);
 		}
 	}
 
diff --git a/src/Application/UI/Form.php b/src/Application/UI/Form.php
index eb73ed2ec..f48722d73 100644
--- a/src/Application/UI/Form.php
+++ b/src/Application/UI/Form.php
@@ -136,7 +136,7 @@ public function signalReceived(string $signal): void
 			}
 		} else {
 			$class = get_class($this);
-			throw new BadSignalException("Missing handler for signal '$signal' in $class.");
+			throw new Nette\Application\RejectRequestException("Missing handler for signal '$signal' in $class.", Nette\Application\RejectRequestException::WRONG_SIGNAL);
 		}
 	}
 }
diff --git a/src/Application/UI/Presenter.php b/src/Application/UI/Presenter.php
index 048439221..f135f823d 100644
--- a/src/Application/UI/Presenter.php
+++ b/src/Application/UI/Presenter.php
@@ -12,6 +12,7 @@
 use Nette;
 use Nette\Application;
 use Nette\Application\Helpers;
+use Nette\Application\RejectRequestException;
 use Nette\Application\Responses;
 use Nette\Http;
 
@@ -303,7 +304,7 @@ public function checkRequirements($element): void
 
 
 	/**
-	 * @throws BadSignalException
+	 * @throws RejectRequestException
 	 */
 	public function processSignal(): void
 	{
@@ -313,10 +314,10 @@ public function processSignal(): void
 
 		$component = $this->signalReceiver === '' ? $this : $this->getComponent($this->signalReceiver, false);
 		if ($component === null) {
-			throw new BadSignalException("The signal receiver component '$this->signalReceiver' is not found.");
+			throw new RejectRequestException("The signal receiver component '$this->signalReceiver' is not found.", RejectRequestException::WRONG_SIGNAL);
 
 		} elseif (!$component instanceof ISignalReceiver) {
-			throw new BadSignalException("The signal receiver component '$this->signalReceiver' is not ISignalReceiver implementor.");
+			throw new RejectRequestException("The signal receiver component '$this->signalReceiver' is not ISignalReceiver implementor.", RejectRequestException::WRONG_SIGNAL);
 		}
 
 		$component->signalReceived($this->signal);
@@ -1161,7 +1162,7 @@ protected function saveGlobalState(): void
 
 	/**
 	 * Initializes $this->globalParams, $this->signal & $this->signalReceiver, $this->action, $this->view. Called by run().
-	 * @throws Nette\Application\BadRequestException if action name is not valid
+	 * @throws RejectRequestException if action name is not valid
 	 */
 	private function initGlobalParameters(): void
 	{
@@ -1192,7 +1193,7 @@ private function initGlobalParameters(): void
 		// init & validate $this->action & $this->view
 		$action = $selfParams[self::ACTION_KEY] ?? self::DEFAULT_ACTION;
 		if (!is_string($action) || !Nette\Utils\Strings::match($action, '#^[a-zA-Z0-9][a-zA-Z0-9_\x7f-\xff]*\z#')) {
-			$this->error('Action name is not valid.');
+			throw new RejectRequestException('Action name is not valid.', RejectRequestException::WRONG_ARGUMENT);
 		}
 		$this->changeAction($action);
 
@@ -1201,7 +1202,7 @@ private function initGlobalParameters(): void
 		if (isset($selfParams[self::SIGNAL_KEY])) {
 			$param = $selfParams[self::SIGNAL_KEY];
 			if (!is_string($param)) {
-				$this->error('Signal name is not string.');
+				throw new RejectRequestException('Signal name is not string.', RejectRequestException::WRONG_ARGUMENT);
 			}
 			$pos = strrpos($param, '-');
 			if ($pos) {
diff --git a/src/Application/exceptions.php b/src/Application/exceptions.php
index 3f0717bca..1114027b7 100644
--- a/src/Application/exceptions.php
+++ b/src/Application/exceptions.php
@@ -67,3 +67,33 @@ class ForbiddenRequestException extends BadRequestException
 	/** @var int */
 	protected $code = Http\IResponse::S403_FORBIDDEN;
 }
+
+
+/**
+ * The exception that indicates request rejected by framework.
+ */
+class RejectRequestException extends UI\BadSignalException
+{
+	public const NO_ROUTE = 1;
+	public const WRONG_PRESENTER = 2;
+	public const WRONG_SIGNAL = 3;
+	public const WRONG_ARGUMENT = 4;
+
+	/** @var int */
+	private $reason;
+
+
+	public function __construct($message, $reason, \Exception $previous = null)
+	{
+		parent::__construct($message, Http\IResponse::S404_NOT_FOUND, $previous);
+	}
+
+
+	/**
+	 * @return int
+	 */
+	public function getReason()
+	{
+		return $this->reason;
+	}
+}