When a notification shows as “Delivered” in OneSignal, it means we have successfully sent the notification to the FCM (Google) / APNs (Apple) / WNS (Microsoft) servers which then distribute the notifications to your subscribers. The following are reasons why notifications may show as “Delivered”, but are not visible on your device.

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Common causes

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Notifications are blocked in Settings

Your Windows or macOS Notification Settings, Do Not Disturb mode and Focus mode may be blocking notifications. You may also have notifications turned off for specific apps like your browsers.
Select Start > Settings > System > Notifications
Turn On NotificationsTurn Off Do not disturbScroll down under Notifications from apps and other senders
Make sure your browsers are turned On.

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Network issues - no internet

Devices must be online to receive push notifications. If your device is turned off, in airplane mode, has unstable or no internet connection, the push will not show until a proper connection is made. You can set the timeframe Google and Apple Servers will wait for a connection with the Time To Live (TTL) Parameter (the default is 3 days). Also check the network / WiFi you’re connected as it may have closed your connection to Apple or Google servers’. Try disabling and re-enabling your internet connection. See our Notifications delayed troubleshooting guide for more details details.

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Not subscribed

Make sure your device is still subscribed to push notifications. You can find your player id with this guide to make sure your device is still subscribed.

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Not targeted in the push

Check the segment you sent the push to and make sure it is setup correctly. This is under Segments. Sometimes an incorrect filter is added to the segment removing certain devices.

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Unregistering service worker or adding pwa

Check your site’s codebase for the .unregister() method. Calling this method will delete Service Workers. See this guide for details on this method. If you have another service worker like for your PWA you will need to follow our Service Worker guide on integrating multiple service workers.

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Browser is closed

Browsers won’t show push notifications unless they are running. If you open the browser before the Time To Live(TTL) expires on a sent notification, it will pop up.

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Clearing browser data

Clearing your browser cookies, data, and/or history will cause the browser to not get notifications any longer and will need to revisit the site to re-subscribe. See Clearing Cache and Resetting Push Permissions.

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Browser app data full

If your mobile browser app has reached its data limit or its data is full, you will need to clear the data on the app. If your mobile browser app has many unread push notifications and/or many tabs open, this can cause notifications to now show.

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Unsupported browser

Users must subscribe to notifications on their desktop or mobile device to receive notifications and it must be a browser that supports push notifications. Please see Web Push FAQ for Supported Web Platforms.

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Debugging web push notifications

Open Chrome and go to your website page with the OneSignal code.
  • Do not use Incognito mode or Guest Browser mode.
  • Do not have any other tabs or windows open to your site.
Mobile Device Debugging:
1

Reset browser permissions

Follow these steps to reset browser permission to access site like a first time user. This example uses Chrome, but similar steps can be followed for Edge, Firefox and others.Click the lock next to your URLNext to Notifications, select Reset permission. You should see “Can ask to send notifications”.Click Cookies and site data
Click Manage cookies and site data
Click the Trash Icon next to your site.Click Done
Click Reload or refresh the page.
2

Subscribe to your site

Follow the steps you normally take to get prompted for push and subscribe to your site.
3

Find your Subscription ID

Open the JavaScript debugging console in one of the following ways:
  • press F12, or
  • right click the site and press “Inspect”, or
  • in the Chrome Menu select View > Developer > JavaScript Console
Open the ConsoleUse this code to get your new OneSignal Subscription ID:OneSignal.User.PushSubscription.id
Find & Set Test Subscriptions in your dashboard, then send yourself a message.
If you do not get the notification, try Debugging using Browser Developer Tools or contact support@onesignal.com with the following information: