diff --git a/app/Notifications/Ninja/ClientBillingFlag.php b/app/Notifications/Ninja/ClientBillingFlag.php
new file mode 100644
index 000000000000..5bfd9294dfeb
--- /dev/null
+++ b/app/Notifications/Ninja/ClientBillingFlag.php
@@ -0,0 +1,74 @@
+<?php
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2023. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://www.elastic.co/licensing/elastic-license
+ */
+
+namespace App\Notifications\Ninja;
+
+use Illuminate\Notifications\Messages\SlackMessage;
+use Illuminate\Notifications\Notification;
+
+class ClientBillingFlag extends Notification
+{
+    /**
+     * Create a new notification instance.
+     *
+     * @return void
+     */
+
+    public function __construct(protected string $account_key, protected string $messasge)
+    {
+    }
+
+    /**
+     * Get the notification's delivery channels.
+     *
+     * @param  mixed  $notifiable
+     * @return array
+     */
+    public function via($notifiable)
+    {
+        return ['slack'];
+    }
+
+    /**
+     * Get the mail representation of the notification.
+     *
+     * @param  mixed  $notifiable
+     */
+    public function toMail($notifiable)
+    {
+    }
+
+    /**
+     * Get the array representation of the notification.
+     *
+     * @param  mixed  $notifiable
+     * @return array
+     */
+    public function toArray($notifiable)
+    {
+        return [
+            //
+        ];
+    }
+
+    public function toSlack($notifiable)
+    {
+        $content = "Client has inapp purchase AND regular plan\n";
+        $content .= "Account: {$this->account_key }\n";
+        $content .= "Message: {$this->messasge}\n";
+
+        return (new SlackMessage)
+                ->success()
+                ->from(ctrans('texts.notification_bot'))
+                ->image('https://app.invoiceninja.com/favicon.png')
+                ->content($content);
+    }
+}