diff --git a/libnotificationmanager/server_p.h b/libnotificationmanager/server_p.h
--- a/libnotificationmanager/server_p.h
+++ b/libnotificationmanager/server_p.h
@@ -23,6 +23,8 @@
 #include <QObject>
 #include <QDBusContext>
 
+#include "notification.h"
+
 class QDBusServiceWatcher;
 
 struct Inhibition
@@ -37,8 +39,6 @@
 namespace NotificationManager
 {
 
-class Notification;
-
 class Q_DECL_HIDDEN ServerPrivate : public QObject, protected QDBusContext
 {
     Q_OBJECT
@@ -97,6 +97,8 @@
     QHash<uint /*cookie*/, Inhibition> m_inhibitions;
     QHash<uint /*cookie*/, QString> m_inhibitionServices;
 
+    Notification m_lastNotification;
+
 };
 
 } // namespace NotificationManager
diff --git a/libnotificationmanager/server_p.cpp b/libnotificationmanager/server_p.cpp
--- a/libnotificationmanager/server_p.cpp
+++ b/libnotificationmanager/server_p.cpp
@@ -186,6 +186,24 @@
         }
     }
 
+    // If multiple identical notifications are sent in quick succession, refuse the request
+    if (m_lastNotification.applicationName() == notification.applicationName()
+            && m_lastNotification.summary() == notification.summary()
+            && m_lastNotification.body() == notification.body()
+            && m_lastNotification.desktopEntry() == notification.desktopEntry()
+            && m_lastNotification.eventId() == notification.eventId()
+            && m_lastNotification.actionNames() == notification.actionNames()
+            && m_lastNotification.urls() == notification.urls()
+            && m_lastNotification.created().msecsTo(notification.created()) < 1000) {
+        qCDebug(NOTIFICATIONMANAGER) << "Discarding excess notification creation request";
+
+        sendErrorReply(QStringLiteral("org.freedesktop.Notifications.Error.ExcessNotificationGeneration"),
+                       QStringLiteral("Created too many similar notifications in quick succession"));
+        return 0;
+    }
+
+    m_lastNotification = notification;
+
     if (wasReplaced) {
         notification.resetUpdated();
         emit static_cast<Server*>(parent())->notificationReplaced(replaces_id, notification);