Notifications

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Learn about the technical aspects of notification delivery on device, including notification types, priorities, and notification center management.

Notifications Documentation

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SHA-2 Root: USERTrust RSA Certification Authority certificate.
Got notification to update this certificate - there was a link to Sectigo.com where I found an attachment with that name - when I clicked it I got a box where it said to install it. Clicked the box and it was saved somewhere on my computer. Now I dont know if that's it or I need to take further actions - please help :-) Have no experience with this - my collegue who did this has stopped. Hoping for a simple answer :-) P
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549
Feb ’25
Remotely dismissing notifications on iOS
I am sending push notifications on iOS, and I can receive and display them correctly. I want to be able to dismiss notifications that have been read server-side (e.g. on a different device) so I am trying to send a custom notification payload alongside a badge counter update, that specifies what notification IDs to remove. I then use removeDeliveredNotifications on the IDs I get. However, it doesn't seem to be working. I am setting the identifier using the apns-collapse-id header and I do see that reflected on the device side. Any ideas what I might be doing wrong? This is how I'm handling push notifications: func userNotificationCenter( _ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void ) { let customPayload = notification.request.content.userInfo if let dismissedNotifications = customPayload["dismissed_notifications"] as? [String] { center.removeDeliveredNotifications(withIdentifiers: dismissedNotifications) } completionHandler([.banner, .sound, .badge]) } I also tried doing the same thing inside func userNotificationCenter( _ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void ) Thank you!
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463
Feb ’25
Apple Wallet Pass Logo Not Showing on notification on iOS 18
I'm having trouble displaying the Apple Wallet pass logo on iOS 18 when a notification occurs. It works on iOS 17 but not on iOS 18 (tested on versions 18.1 and 18.3). I ensured the Wallet pass icon sizes are correct: icon.png → 29×29 icon@ 2x.png → 58×58 icon@ 3x.png → 87×87 Questions: Has Apple changed any requirements for displaying Wallet pass logos in iOS 18? Are there new size, format, or metadata constraints?
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529
Feb ’25
Push notification volume for custom sound
Is there a way to configure the APNS notification sound volume to be louder? I am implementing some custom sounds(narrative sentences) for APNS, it does play the custom sound, but the volume of the custom sound is not loud enough even though I had set the device's volume and "RingTone and Alerts" volume to max. I tried to amplify the custom sound file, it does play louder but the result is minimum if I want to maintain the quality of the sound without it been distorted. I tried to use Notification Service Extension, AVAudioPlayer and AVAudioSession to play the sound, it does play louder in max volume compare with relying on default sound payload in APNS, but the problem is AVAudioPlayer and AVAudioSession do not seems to be usable when the application is in background or killed state, is there any other alternative I could use?
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135
Apr ’25
didRegisterForRemoteNotificationsWithDeviceToken called twice when also using CKSyncEngine in project
In didFinishLaunchingWithOptions I have this setup for getting the token to send to my server for notifications. The issue is that the delegate callback didRegisterForRemoteNotificationsWithDeviceToken gets called twice when also initializing a CKSyncEngine object. This confuses me. Is this expected behavior? Why is the delegate callback only called twice when both are called, but not at all when only using CKSyncEngine. See code and comments below. /// Calling just this triggers `didRegisterForRemoteNotificationsWithDeviceToken` once. UIApplication.shared.registerForRemoteNotifications() /// When triggering the above function plus initializing a CKSyncEngine, `didRegisterForRemoteNotificationsWithDeviceToken` gets called twice. /// This somewhat make sense, because CloudKit likely also registers for remote notifications itself, but why is the delegate not triggered when *only* initializing CKSyncEngine and removing the `registerForRemoteNotifications` call above? let syncManager = SyncManager() /// Further more, if calling `registerForRemoteNotifications` with a delay instead of directly, the delegate is only called once, as expected. For some reason, the delegate is only triggered when two entities call `registerForRemoteNotifications` at the same time? DispatchQueue.main.asyncAfter(deadline: .now() + 4) { UIApplication.shared.registerForRemoteNotifications() } func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) { print("didRegisterForRemoteNotificationsWithDeviceToken") }
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100
Nov ’25
About APNS certificate replacement
I received an email from Apple saying that I needed to replace the APNS certificate. I am inquiring because I am curious about who has the relevant authority and who actually makes the changes. Could you please provide specific guidance on this? Hello, We’re reaching out with a final reminder that the Certification Authority (CA) for Apple Push Notification service (APNs) is changing. APNs updated the server certificates in sandbox on January 21, 2025. APNs production server certificates will be updated on February 24, 2025. To continue using APNs without interruption, you’ll need to update your application’s Trust Store to include the new server certificate: SHA-2 Root: USERTrust RSA Certification Authority certificate. To ensure a smooth transition and avoid push notification delivery failures, please make sure that both old and new server certificates are included in the Trust Store before the cut-off date for each of your application servers that connect to sandbox and production. At this time, you don’t need to update the APNs SSL provider certificates issued to you by Apple. If you have any questions, please contact us. The Apple Developer Relations Team
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722
Feb ’25
iOS App not able to get VoIP push notification when device is powered on, After opening App VoIP push receiving
When User restarted iOS device, after powering on iOS App is not able to get VoIP push notification. If user opens App, immediate VoIP push receiving. In Normal (App Kill or Background state) everything works as expected. Issue is when device is powered on and immediately( In 1-2 mins) try to call on device. We are using delegate to show Call to User public func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType, completion: @escaping () -> Void)
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203
Jul ’25
Push notification MacOS "discarded as device was offline"
Hi everyone, I am having issues with all my MacOS devices (3 so far) and push notifications. My app is in development and when i send a Test APN (From the Push Notification Console) to any of my MacOS devices (using the device token), the log is "discarded as device was offline". Fun fact, if i run the command : sudo kill apsd I receive the previously "discarded" Push notification immediately. Is it a known bug or something is wrong in my configuration ? Note : my debugProfile.entitlements is fine and the value is set to "development", i have already reloaded my certificate by cleaning the project and rebuilding (according to ChatGPT) but nothing works... I am using Xcode 26.0.1 and MacOS 26.0.1 on my 3 different MacOS devices all having this issue. Thanks in advance, Tom
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181
Oct ’25
Email VIP Alerts on iPhone Lock Screen
From iPhone iOS 18.3 , 18.3.1, and 18.4 Dev2, VIP Mail alerts will not wake a phone display to notify of a new mail received for a VIP contact. The phone will sound an audible tone indicating the mail was received, and if you manually wake the screen by tapping and then dragging upward to show notifications you will then see the VIP mail alert. However if the screen is sleeping, it will not light up or wake to indicate or display the new mail. The problem was briefly resolved in 18.4 Dev1, but problem returns in Dev2. We see this across all iPhone 16 Pros and iPhone SE2 with iOS 18.3 or higher. Is this something acknowledged by Apple as on track for resolution in iOS 18.4 Final Release? Thank you.
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477
Mar ’25
APNS is delivering expired voip push notification.
I have tried setting a 'apns-expiration' to current time + 30 seconds and also a value '0'. But still my voip app receives the voip push notification after 2-3 minutes. Till this time, caller has already hung up the call. But the receivers phone still rings on receiving the push notification as we have to report it to CallKit. Am I missing something or there is no way and even 'apns-expiration' does not guarantee timely delivery of Voip push notifications or discard if it is expired. I have set 'apns-priority' to 10 already as recommended.
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377
Mar ’25
APNs keep returning unregistered token
Hi, we've observed a weird behavior for a small amount of our user that we keep receiving the same token from APNs despite it's shown as Unregistered. When we try to send push to the token, we got an Unregistered error so we remove that token from our server. However, later we would receive an add token request from the client with the same token we just removed, and when we try to send to the token it returns Unregistered again so we remove the token again. This happened 3 times for a user in an hour. The identifierForVendor remains the same for all the requests. We also owns the client and I've checked client code that it's sending the token it received from didRegisterForRemoteNotificationsWithDeviceToken to the server.
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1.9k
Nov ’25
APNs Returning 200 OK for Uninstalled Apps
We're experiencing an issue with Apple Push Notification service where APNs continues to return 200 OK responses for device tokens belonging to uninstalled applications. Issue Details: When sending push notifications to device tokens, APNs returns 200 OK responses even for devices where our app was uninstalled more than a month ago Thanks in advanced for support
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150
Jul ’25
Consent Revocation Notification
We are in the process of preparing our app to support the new Texas law (SB2420) that takes effect 1/1/2026. After reviewing Apple's recent announcements​/docs concerning this subject, one thing isn't clear to me: how to associate an app install with a​n App Store Server RESCIND_CONSENT notification​ that could be delivered to our server. Our app is totally free so there isn't an originalTransactionId​ or other similar transaction IDs that would be generated as part of an in-app purchase (and then subsequently sent as part of the payload in the notification to our server during an in-app purchase scenario). So my question is: How do I associate an app (free app) install with an App Store Server RESCIND_CONSENT notification​ that is sent to our server​?
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1w
Case-ID: 14080335 Push notification requests to iOS devices using APNs (HTTP/2) time out
We are currently developing a WebAPI service that uses APNs (HTTP/2) to send push notifications to iOS devices. (Using PushSharp's HTTP/2 support) The WebAPI service is running on IIS using .net framework 4.8 and c#. The connection to APNs is always maintained, and the connection is checked every 30 minutes using a dummy token Ping. KeepAlivePeriod = 30 minutes and KeepAliveRetryPeriod = 10 seconds have also been set. However, the following issues are occurring. Although the Ping sent immediately before was successful, a TimeoutException occurs in the notification request sent a few minutes later. There is no explicit disconnection notification from APNs, and the connection appears to be silently disconnected. Once a TimeoutException occurs, it occurs frequently afterwards. Below is an excerpt from the log. Apple Notification Failed for some unknown reason 1-1: One or more errors occurred. Apple Notification Failed for some unknown reason 1-2:System.TimeoutException: The operation timed out. In light of this issue, I would like to be advised on the following two points. Are there any official specifications regarding the lifecycle and expiration date of APNs HTTP/2 connections? Even if pings are sent periodically, is there a timeout or other setting that disables the connection on the APNs side? What are the conditions that would cause APNs to silently terminate a connection? For example, could this be due to inactivity, TLS restrictions, network maintenance, etc.? If you have any official documentation or technical guidelines to improve the reliability of this system, we would appreciate it if you could share them with us. Thank you in advance.
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262
May ’25
Live Activities - Missing Entitlement
I've built an app that supports live activities, but when trying to build and deploy I'm getting the error: Provisioning profile "iOS Team Provisioning Profile doesn't include the com.apple.developer.live-activity entitlement." Looking in Xcode - under signing and provisions, there is no "Live Activity" option to select. Looking in the developer portal, similarly under Certificates, Identifiers & Profiles, there is no "Live Activity" option. I've added com.apple.developer.live-activity to my entitlements file for both my widget and my main app target, and added NSSupportsLiveActivities to my info.plist files. I'm building on Xcode Version 16.0 Any ideas on how to fix this? Super confused! Thanks in advance!
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780
Dec ’24
Notification Service Extension not getting invoked on macOS
I’m testing remote push notifications on macOS, and although notifications are received and displayed correctly, my Notification Service Extension (NSE) never gets invoked. The extension is properly added as a target in the same app, uses the UNNotificationServiceExtension class, and implements both didReceive(_:withContentHandler:) and serviceExtensionTimeWillExpire(). I’ve also set "mutable-content": 1 in the APNS payload, similar to how it works on iOS — where the same code correctly triggers the NSE. On macOS, however, there’s no sign that the extension process starts or the delegate methods are called. import UserNotifications class NotificationService: UNNotificationServiceExtension { override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) { let modified = (request.content.mutableCopy() as? UNMutableNotificationContent) modified?.title = "[Modified] " + (modified?.title ?? "") contentHandler(modified ?? request.content) } override func serviceExtensionTimeWillExpire() { // Called if the extension times out before finishing } } And the payload used for testing: { "aps": { "alert": { "title": "Meeting Reminder", "body": "Join the weekly sync call" }, "mutable-content": 1 }, "MEETING_ORGANIZER": "Alex Johnson" } Despite all correct setup steps, the NSE never triggers on macOS (while working fine on iOS). Can anyone confirm whether UNNotificationServiceExtension is fully supported for remote notifications on macOS, or if additional configuration or entitlement is needed?
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106
Nov ’25
Missing notification – APNs success but not delivered to device
We have a customer reporting that they didn’t receive some of their push notifications. On November 3, 2025, four push notifications were sent — the customer received the first three but not the last one. Our logs show a successful response from APNs, with the apns-id c116d650-efc6-4fb1-8a74-382d5bab4692. A very similar case occurred on October 31, where the customer also claimed not to have received the notification, yet our logs again show success from APNs with apns-id 1468ef43-66d6-40d2-b10a-c96889fcb65a. Wondering if there any way to help us to trace these cases. Thanks
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157
Nov ’25
Notification Service Extension and the main thread
Question, if I am writing async code in the notification service extension, I understand it terminates after 30 seconds. If I want to wait until these async methods finish before calling the content handler, I believe an option I have is to use dispatch groups. However I am open to other solutions if there are better options. My question is, if I use dispatch groups, is there any issue in using the main queue here? Or does the main thread not make sense to use in the context of the NSE? dispatch_group_notify(group, dispatch_get_main_queue(), ^{ if (self.contentHandler) { self.contentHandler(self.bestAttemptContent); } }); Or is it recommended to instead use a different queue in the NSE? dispatch_queue_t nseQueue = dispatch_queue_create("com.blah.blah.nse.queue", DISPATCH_QUEUE_SERIAL); dispatch_group_notify(group, dispatch_get_global_queue(QOS_CLASS_(SOMETHING), 0), ^{ ... }); OR am I over thinking this? :) Thanks ahead of time, relatively new to iOS so just looking to learn/understand better.
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270
Jun ’25