diff --git a/lib/private/Notification/Manager.php b/lib/private/Notification/Manager.php
index ec831cf979..4b57db4bac 100644
--- a/lib/private/Notification/Manager.php
+++ b/lib/private/Notification/Manager.php
@@ -24,6 +24,7 @@
 namespace OC\Notification;
 
 
+use OC\RichObjectStrings\Validator;
 use OCP\Notification\IApp;
 use OCP\Notification\IManager;
 use OCP\Notification\INotification;
@@ -149,7 +150,9 @@ class Manager implements IManager {
 	 * @since 8.2.0
 	 */
 	public function createNotification() {
-		return new Notification();
+		return new Notification(
+			new Validator()
+		);
 	}
 
 	/**
diff --git a/lib/private/Notification/Notification.php b/lib/private/Notification/Notification.php
index 7bf4b9a74c..7346f35f96 100644
--- a/lib/private/Notification/Notification.php
+++ b/lib/private/Notification/Notification.php
@@ -26,8 +26,14 @@ namespace OC\Notification;
 
 use OCP\Notification\IAction;
 use OCP\Notification\INotification;
+use OCP\RichObjectStrings\InvalidObjectExeption;
+use OCP\RichObjectStrings\IValidator;
 
 class Notification implements INotification {
+
+	/** @var IValidator */
+	protected $richValidator;
+
 	/** @var string */
 	protected $app;
 
@@ -52,6 +58,12 @@ class Notification implements INotification {
 	/** @var string */
 	protected $subjectParsed;
 
+	/** @var string */
+	protected $subjectRich;
+
+	/** @var array */
+	protected $subjectRichParameters;
+
 	/** @var string */
 	protected $message;
 
@@ -81,8 +93,11 @@ class Notification implements INotification {
 
 	/**
 	 * Constructor
+	 *
+	 * @param IValidator $richValidator
 	 */
-	public function __construct() {
+	public function __construct(IValidator $richValidator) {
+		$this->richValidator = $richValidator;
 		$this->app = '';
 		$this->user = '';
 		$this->dateTime = new \DateTime();
@@ -92,6 +107,8 @@ class Notification implements INotification {
 		$this->subject = '';
 		$this->subjectParameters = [];
 		$this->subjectParsed = '';
+		$this->subjectRich = '';
+		$this->subjectRichParameters = [];
 		$this->message = '';
 		$this->messageParameters = [];
 		$this->messageParsed = '';
@@ -261,6 +278,43 @@ class Notification implements INotification {
 		return $this->subjectParsed;
 	}
 
+	/**
+	 * @param string $subject
+	 * @param array $parameters
+	 * @return $this
+	 * @throws \InvalidArgumentException if the subject or parameters are invalid
+	 * @since 9.2.0
+	 */
+	public function setRichSubject($subject, array $parameters = []) {
+		if (!is_string($subject) || $subject === '') {
+			throw new \InvalidArgumentException('The given parsed subject is invalid');
+		}
+		$this->subjectRich = $subject;
+
+		if (!is_array($parameters)) {
+			throw new \InvalidArgumentException('The given subject parameters are invalid');
+		}
+		$this->subjectRichParameters = $parameters;
+
+		return $this;
+	}
+
+	/**
+	 * @return string
+	 * @since 9.2.0
+	 */
+	public function getRichSubject() {
+		return $this->subjectRich;
+	}
+
+	/**
+	 * @return array[]
+	 * @since 9.2.0
+	 */
+	public function getRichSubjectParameters() {
+		return $this->subjectRichParameters;
+	}
+
 	/**
 	 * @param string $message
 	 * @param array $parameters
@@ -454,6 +508,14 @@ class Notification implements INotification {
 	 * @since 8.2.0
 	 */
 	public function isValidParsed() {
+		if ($this->getRichSubject() !== '' || !empty($this->getRichSubjectParameters())) {
+			try {
+				$this->richValidator->validate($this->getRichSubject(), $this->getRichSubjectParameters());
+			} catch (InvalidObjectExeption $e) {
+				return false;
+			}
+		}
+
 		return
 			$this->isValidCommon()
 			&&
diff --git a/lib/public/Notification/INotification.php b/lib/public/Notification/INotification.php
index fd16876a66..3a8bde0a37 100644
--- a/lib/public/Notification/INotification.php
+++ b/lib/public/Notification/INotification.php
@@ -127,6 +127,27 @@ interface INotification {
 	 */
 	public function getParsedSubject();
 
+	/**
+	 * @param string $subject
+	 * @param array $parameters
+	 * @return $this
+	 * @throws \InvalidArgumentException if the subject or parameters are invalid
+	 * @since 9.2.0
+	 */
+	public function setRichSubject($subject, array $parameters = []);
+
+	/**
+	 * @return string
+	 * @since 9.2.0
+	 */
+	public function getRichSubject();
+
+	/**
+	 * @return array[]
+	 * @since 9.2.0
+	 */
+	public function getRichSubjectParameters();
+
 	/**
 	 * @param string $message
 	 * @param array $parameters
diff --git a/tests/lib/Notification/NotificationTest.php b/tests/lib/Notification/NotificationTest.php
index 77d9e989cf..eabed27360 100644
--- a/tests/lib/Notification/NotificationTest.php
+++ b/tests/lib/Notification/NotificationTest.php
@@ -23,16 +23,21 @@ namespace Test\Notification;
 
 
 use OC\Notification\Notification;
+use OCP\Notification\IAction;
 use OCP\Notification\INotification;
+use OCP\RichObjectStrings\IValidator;
 use Test\TestCase;
 
 class NotificationTest extends TestCase {
 	/** @var INotification */
 	protected $notification;
+	/** @var IValidator|\PHPUnit_Framework_MockObject_MockObject */
+	protected $validator;
 
 	public function setUp() {
 		parent::setUp();
-		$this->notification = new Notification();
+		$this->validator = $this->createMock(IValidator::class);
+		$this->notification = new Notification($this->validator);
 	}
 
 	protected function dataValidString($maxLength) {
@@ -416,14 +421,12 @@ class NotificationTest extends TestCase {
 
 	public function testCreateAction() {
 		$action = $this->notification->createAction();
-		$this->assertInstanceOf('OCP\Notification\IAction', $action);
+		$this->assertInstanceOf(IAction::class, $action);
 	}
 
 	public function testAddAction() {
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action = $this->createMock(IAction::class);
 		$action->expects($this->once())
 			->method('isValid')
 			->willReturn(true);
@@ -441,9 +444,7 @@ class NotificationTest extends TestCase {
 	 */
 	public function testAddActionInvalid() {
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action = $this->createMock(IAction::class);
 		$action->expects($this->once())
 			->method('isValid')
 			->willReturn(false);
@@ -455,9 +456,7 @@ class NotificationTest extends TestCase {
 
 	public function testAddActionSecondPrimary() {
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action = $this->createMock(IAction::class);
 		$action->expects($this->exactly(2))
 			->method('isValid')
 			->willReturn(true);
@@ -473,9 +472,7 @@ class NotificationTest extends TestCase {
 
 	public function testAddParsedAction() {
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action = $this->createMock(IAction::class);
 		$action->expects($this->once())
 			->method('isValidParsed')
 			->willReturn(true);
@@ -493,9 +490,7 @@ class NotificationTest extends TestCase {
 	 */
 	public function testAddParsedActionInvalid() {
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action = $this->createMock(IAction::class);
 		$action->expects($this->once())
 			->method('isValidParsed')
 			->willReturn(false);
@@ -507,9 +502,7 @@ class NotificationTest extends TestCase {
 
 	public function testAddActionSecondParsedPrimary() {
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action = $this->createMock(IAction::class);
 		$action->expects($this->exactly(2))
 			->method('isValidParsed')
 			->willReturn(true);
@@ -525,9 +518,7 @@ class NotificationTest extends TestCase {
 
 	public function testAddActionParsedPrimaryEnd() {
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action1 = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action1 = $this->createMock(IAction::class);
 		$action1->expects($this->exactly(2))
 			->method('isValidParsed')
 			->willReturn(true);
@@ -535,9 +526,7 @@ class NotificationTest extends TestCase {
 			->method('isPrimary')
 			->willReturn(false);
 		/** @var \OCP\Notification\IAction|\PHPUnit_Framework_MockObject_MockObject $action */
-		$action2 = $this->getMockBuilder('OCP\Notification\IAction')
-			->disableOriginalConstructor()
-			->getMock();
+		$action2 = $this->createMock(IAction::class);
 		$action2->expects($this->once())
 			->method('isValidParsed')
 			->willReturn(true);
@@ -570,12 +559,13 @@ class NotificationTest extends TestCase {
 	 */
 	public function testIsValid($isValidCommon, $subject, $expected) {
 		/** @var \OCP\Notification\INotification|\PHPUnit_Framework_MockObject_MockObject $notification */
-		$notification = $this->getMockBuilder('\OC\Notification\Notification')
+		$notification = $this->getMockBuilder(Notification::class)
 			->setMethods([
 				'isValidCommon',
 				'getSubject',
 				'getParsedSubject',
 			])
+			->setConstructorArgs([$this->validator])
 			->getMock();
 
 		$notification->expects($this->once())
@@ -602,12 +592,13 @@ class NotificationTest extends TestCase {
 	 */
 	public function testIsParsedValid($isValidCommon, $subject, $expected) {
 		/** @var \OCP\Notification\INotification|\PHPUnit_Framework_MockObject_MockObject $notification */
-		$notification = $this->getMockBuilder('\OC\Notification\Notification')
+		$notification = $this->getMockBuilder(Notification::class)
 			->setMethods([
 				'isValidCommon',
 				'getParsedSubject',
 				'getSubject',
 			])
+			->setConstructorArgs([$this->validator])
 			->getMock();
 
 		$notification->expects($this->once())
@@ -648,7 +639,7 @@ class NotificationTest extends TestCase {
 	 */
 	public function testIsValidCommon($app, $user, $timestamp, $objectType, $objectId, $expected) {
 		/** @var \OCP\Notification\INotification|\PHPUnit_Framework_MockObject_MockObject $notification */
-		$notification = $this->getMockBuilder('\OC\Notification\Notification')
+		$notification = $this->getMockBuilder(Notification::class)
 			->setMethods([
 				'getApp',
 				'getUser',
@@ -656,6 +647,7 @@ class NotificationTest extends TestCase {
 				'getObjectType',
 				'getObjectId',
 			])
+			->setConstructorArgs([$this->validator])
 			->getMock();
 
 		$notification->expects($this->any())