Hi, You're here because you've had issues with your implementation of Wallet Extensions for Apple Pay In-App Provisioning or In-App Verification. To prevent sending sensitive credentials in plain text, create a new report in Feedback Assistant to share the details requested below with the appropriate log profiles installed. Gathering Required Information for Troubleshooting Apple Pay In-App Provisioning or In-App Verification Issues While troubleshooting Apple Pay In-App Provisioning or In-App Verification, it is essential that the issuer is able to collect logs on their device and check those logs for error message. This is also essential when reporting issues to Apple. To gather the required data for your own debugging as well as reporting issues, please perform the following steps on the test device: Install the Apple Pay and Wallet profiles on your iOS or watchOS device. If the issue occurs on Mac, continue to Step 2. Reproduce the issue and make a note of the timestamp when the issue occurred, while optionally capturing screenshots or video. Gather a sysdiagnose on the same iOS or watchOS device, or on macOS. Create a Feedback Assistant report with the following information: The bundle IDs App bundle ID Non-UI app extension bundle ID (if applicable) UI app extension bundle ID (if applicable) The serial number of the device. For iOS and watchOS: Open Settings > General > About > Serial Number (tap and hold to copy). For macOS: Open the Apple () menu > About This Mac > Serial Number. The SEID (Secure Element Identifier) of the device, represented as a HEX encoded string. For iOS and watchOS: Open Settings > General > About > SEID (tap and hold to copy). For macOS: Open the Apple () menu > About This Mac > System Report > NVMExpress > Serial Number. The sysdiagnose gathered after reproducing the issue. The timestamp (including timezone) of when the issue was reproduced. The type of provisioning failure (e.g., error at Terms & Conditions, error when adding a card, etc.) The issuer/network/country of the provisioned card (e.g., Mastercard – US) Last 4 digits of the FPAN Last 4 digits of the DPAN (if available) Was this test initiated from the Issuer App? (e.g., yes or no) The type of environment (e.g., sandbox or production) Screenshots or videos of errors and unexpected behaviors (optional). Important: From the logs gathered above, you should be able to determine the cause of the failure from PassbookUIService, PassKit or PassKitCore, and by filtering for your SEID or bundle ID of your app or app extensions in the Console app. Submitting your feedback Before you submit to Feedback Assistant, please confirm the requested information above is included in your feedback. Failure to provide the requested information will only delay my investigation into the reported issue within your Apple Pay client. After your submission to Feedback Assistant is complete, please respond in your existing Developer Forums post with the Feedback ID. Once received, I can begin my investigation and determine if this issue is caused by an error within your client, a configuration issue within your developer account, or an underlying system bug. Cheers, Paris X Pinkney |  WWDR | DTS Engineer

Hi, To ensure the issue is not caused by an error within your app or web service request, please review the Apple Pay Merchant Integration Guide. Additionally, please review the following technotes on Apple Pay: TN3173: Troubleshooting issues with your Apple Pay merchant identifier configuration TN3174: Diagnosing issues with the Apple Pay payment sheet on your website TN3175: Diagnosing issues with displaying the Apple Pay button on your website TN3176: Troubleshooting Apple Pay payment processing issues If the resources above don’t help identify the cause of the error, please provide more information about your app or web services to get started. To prevent sending sensitive credentials in plain text, create a report in Feedback Assistant to share the details requested below. Additionally, if the error is something we need to investigate further, the appropriate engineering teams also have access to the same information and can communicate with you directly within Feedback Assistant for more information, as needed. Please follow the instructions below to submit your report. For issues occurring with your native app or web service, perform the following steps: Install the Apple Pay profile on your iOS or watchOS device. If the issue occurs on Mac, continue to Step 2. Reproduce the issue and make a note of the timestamp when the issue occurred, while optionally capturing screenshots or video. Gather a sysdiagnose on the same iOS or watchOS device, or on macOS. Create a Feedback Assistant report with the following information: The serial number of the device. For iOS and watchOS: Open Settings > General > About > Serial Number (tap and hold to copy). For macOS: Open the Apple () menu > About This Mac > Serial Number. The SEID (Secure Element Identifier) of the device, represented as a HEX encoded string. For iOS and watchOS: open Settings > General > About > SEID (tap and hold to copy). For macOS: Open the Apple () menu > About This Mac > System Report > NVMExpress > Serial Number. The sysdiagnose gathered after reproducing the issue. The timestamp of when the issue was reproduced. Screenshots or videos of errors and unexpected behaviors (optional). Important: From the logs gathered above, you should be able to determine the cause of the failure from PassbookUIService, PassKit or PassKitCore, and by filtering for your SEID or merchant domain in the Safari Web Inspector. See Inspecting Safari on macOS to learn more. Submitting your feedback Before you submit to Feedback Assistant, please confirm the requested information above is included in your feedback. Failure to provide the requested information will only delay my investigation into the reported issue within your Apple Pay website. After your submission to Feedback Assistant is complete, please respond in your existing Developer Forums post with the Feedback ID. Once received, I can begin my investigation and determine if this issue is caused by an error within your web implementation, a configuration issue within your developer account, or an underlying system bug. Cheers, Paris X Pinkney |  WWDR | DTS Engineer

Hello, I am experiencing an issue with the Apple Pay capability on my App ID. I have created a Merchant ID. I enabled Apple Pay in the App ID configuration and linked it to the merchant. However, sometimes when I revisit the App ID in the Apple Developer portal, the Apple Pay capability appears disabled, even though I saved it. This happens intermittently; at some times the capability is correctly shown as enabled, and other times it disappears. Context: I am using Expo Managed Workflow with EAS Build for iOS. The issue prevents the provisioning profile from including Apple Pay, which causes Stripe isPlatformPaySupported function to return false on ios devices. Attached: Screenshots of the App ID page showing Apple Pay enabled and disabled. Could you please advise why the capability is not being consistently saved, and how to ensure it stays enabled? Thank you,

Hi, we are implementing the push provisioning via the Apple Wallet Extension starting from the example at https://developer.apple.com/documentation/passkit/implementing-wallet-extensions. To correctly manage the push provisioning on Apple Watch, specifically for a card tokenised in the iPhone but not in the Watch, we need to know if there is a connected Apple Watch to the iPhone. We are using the following code from the Apple Wallet Extension example to detect whether there is a connected watch: WCSession* session = [WCSession defaultSession]; session.delegate = delegate; [session activateSession]; In the main target of the app, at the end of the activation the system correctly calls the delegate method: session:activationDidCompleteWithState:error: but we noticed it is not being called in the UI extension context (the one having NSExtensionPointIdentifier: com.apple.PassKit.issuer-provisioning.authorization). We don't understand why the delegate is not being called in the UI extension, can you please help? Thanks! Steps to Reproduce: Start with a card not added in the Apple Wallet app Open the Apple Wallet app Click on add card Select the app to launch the Wallet Extension flow The Apple Wallet Extension with UI is on screen and invokes the activateSession method, the delegate method is not invoked and session.isPaired returns "no". Xcode Version 16.2 macOS Version 15.6.1 (24G90) Feedback ID FB20082564

MacOS: 12 ( Monterrey ) Safari: 17.6 Demo Site: https://applepaydemo.apple.com/ At the bottom where the Apple Pay button should appear, I see a warning something like "This browser doesn't support Apple Pay, please use safari" along with a link to requirements for apple pay. All the requirements are fulfilled, OS and Safari's version are above the minimum required. Link was opened in Safari. And the other thing is if I open the same site in Chrome, I can see the apple pay button and when I click on it a QR appears which is the expected behaviour. How to resolve this?

I'm calling the endpoint https://apple-pay-gateway-cert.apple.com/paymentservices with mTLS and it's taking over 15 seconds to complete the request. This is happening only when deployed through AWS. I have tried a dummy dotnet and node lambda with the same result. Wondering if anyone had the same issue. Also stack overflow post explaining the code in more depth - https://stackoverflow.com/questions/79755891/mtls-http-call-taking-over-15-seconds

Hi, I set up a Sandbox Tester account in my company’s Apple Developer Program and signed in on my iPhone under Settings → App Store → Sandbox Account. When I go to Wallet → Add, I only see options for Credit or Debit Card or Travel Card. The option to add an Apple Pay Sandbox Card is missing, and when I try entering the test card numbers from Apple’s documentation (developer.apple.com/apple-pay/sandbox-testing), the card is not valid. Has anyone experienced this and found a solution? Thanks! PS: I can't post this to Wallet Category, I keep getting error that it contains sensitive text.

We are unable to add/remove Merchant IDs in App IDs identifier profile, after pressing "Edit" button on "Apple Pay Payment Processing" section, then choosing desired Merchant ID to check/uncheck from the available Merchant IDs, then pressing Continue/Save/Confirm buttons - nothing happens, the "Save" button text briefly changes to "Processing" and then back To "Save" and we still have previously enabled Merchant IDs and the Save button is still in enabled state, any help?

We rely on ApplePaySession.applePayCapabilities() to decide whether to show the Apple Pay button. We use two different merchant IDs for non-prod/prod environments, and encountered a change in behavior where this API now returns different results. These merchant IDs are generated from a third-party provider Adyen. However, Adyen has informed us that they are unable to identify the root cause of the issue and advised us to seek assistance directly from Apple Pay support. Timeline Last known working date: 13/08/2025 Issue first noticed: 18/08/2025 Environment Details Apple Pay JS API version 1.latest Browsers Tested: Third party browsers including Chrome/139.0.0.0, Firefox/141.0 Browsers with ApplePaySession built-in (like iOS Chrome, iOS Safari, and macOS Safari) are working fine Framework Stack: Angular v18.1.3 (important) no configuration setup in Apple dev account, merchantId is generated from a third-party provider Adyen. Current Execution Flow: Apple Pay JS API script element is injected <script type="text/javascript" async="" src="https://applepay.cdn-apple.com/jsapi/1.latest/apple-pay-sdk.js"></script> Triggers below to check apple pay readiness, different ${merchantId_credential} is used: await window.ApplePaySession.applePayCapabilities(`${merchantId_credential}`); (**ApplePaySession is a valid object at this point) Observed that different paymentCredentialStatus is returned // nonprod env { "paymentCredentialStatus": "applePayUnsupported" // unexpected } // prod env { "paymentCredentialStatus": "paymentCredentialStatusUnknown" } The same code is executed in each environment and the behaviour was also the same, but has changed since then. Side notes By checking the SDK’s internal code, we saw that in third-party browsers it makes an extra call to the following endpoint. Responses from this call also come back differently depending on the merchantId. When invoking below: curl -X POST \ https://smp-paymentservices.apple.com/paymentservices/v3/checkStatus/merchant/{merchantId} \ -H 'Content-Type: application/json' \ -d '{ "initiative": "web", "initiativeContext": "env_specific_domain" }' Our non-prod environment returns {"registered":false} while using prod's merchantId and domain it returns {"registered":true}. We thought the issue might be domain-related since the environments are on different domains, but so far, no luck. The main questions we're looking to resolve are: Why did the behavior change at a certain point despite no code changes? How should we approach this investigation, and what specific requests should we be making to the Adyen team? Why does the response from the call to https://smp-paymentservices.apple.com/paymentservices/v3/checkStatus/merchant/{merchantId} return different results? Perhaps this could provide a clue regarding the question above? We noticed that canMakePayments() is returning true, so we could consider using that as a workaround. Would it be safe to change the source of truth relying on canMakePayments() for displaying Apple Pay? There is a concern that this issue may also occur in our production environment, so we would appreciate assistance in understanding what is happening and finding a resolution.

We have Wallet and Watch application on iPhone. Both of them can add card and then waiting for activation. However, When the same card is added to Wallet and Watch respectively, waiting for the app-to-app mode to be activated. Client doesn't aware the source application. Because deeplink is exactly the same. Any adivse how does the client have to choose which card to activate?

Hello, We are experiencing a consistent delay when initiating Apple Pay sessions using the https://apple-pay-gateway.apple.com/paymentservices/startSession endpoint. Below is a detailed overview of our setup and the issue. Setup Our web service is hosted in AWS and there is a proxy server between our web service and Apple servers. We are passing the correct domain in the initiativeContext field of the startSession request. The .well-known/apple-developer-merchantid-domain-association file is hosted on a different domain, which is also correctly configured and associated with our merchant ID in the Apple Developer portal. Observed Behavior When the same request is made from a local development environment, Apple responds immediately (under 1 second). When the request is made from our AWS-hosted service, Apple responds with a valid session, but only after a consistent ~15-second delay. The content and response are otherwise identical — only the timing differs. We would appreciate any insights or suggestions from others who have faced similar behavior or from the Apple Pay team. Thank you in advance!

Hi,
 We’re implementing Apple Pay on the Web for a multi-tenant platform via a PSP. The PSP operates multiple HSM/clusters and gave us multiple CSRs, asking us to register all.
Our understanding: a Merchant ID can hold several PPCs over time, but only one is active at once. Questions Is there any supported way to keep more than one PPC active simultaneously for the same Merchant ID? If not, what does Apple recommend for web-only, multi-tenant setups: a single MID with PSP-side decryption & sub-merchant separation, or separate MIDs per brand/region? Any official guidance on PPC rotation and handling many domains for Apple Pay on the Web? links to official docs or prior Apple responses would be appreciated.

We are experiencing intermittent 403 Forbidden errors during Apple Pay on web merchant validation in our production and sandbox environment. Has anyone else started seeing 403 Forbidden errors recently (since mid-2025)? Why would merchant validation be sometimes successful and sometimes fail with 403? Could this be related to new Apple Pay gateway changes or stricter validation rules? Any additional debug steps or permanent solutions we should try? Thank you.

We are writing to report a recurring stability issue with the Apple Pay sandbox environment. We are using the official sandbox test cards provided on the Apple Developer website for our testing: https://developer.apple.com/apple-pay/sandbox-testing/ We are experiencing frequent, intermittent failures when attempting to add these sandbox cards to the Wallet for testing purposes. The issue typically occurs a couple of times per day. When the failure occurs, the card provisioning process fails unexpectedly. The issue is not limited to a single card; we have observed this behavior across all available card networks. In some instances, all cards (Visa, Mastercard, Discover, Amex) fail to provision simultaneously. At other times, the issue appears to be isolated to specific networks while others work correctly. Crucially, the issue appears to be temporary. After some time passes (ranging from minutes to an hour), we are able to add the exact same card successfully without making any changes to our test environment or configuration. We have diligently checked our setup to rule out configuration errors on our end. This includes verifying: The device is set to a supported region. We are signed in with a valid sandbox tester Apple ID. All other prerequisites for sandbox testing are met. The fact that the process works correctly at other times strongly suggests that this is a server-side stability issue within the Apple Pay sandbox environment rather than a persistent misconfiguration on our part. To help with your investigation, we have attached an image that demonstrates a failed attempt to add a card. Could you please investigate the stability of the sandbox card provisioning service? Please let us know if this is a known issue or if there is any further information we can provide. Thank you for your time and assistance.

Hello, We are trying to provision in apple wallet, I am getting an error "Card can not be added". Please check below and let me know if I am missing anything. SEID: 04401D7BCE578001930001236930311377D86C15D956BBA1 TimeStamp: 2025-08-18 11:53:04.570431-0500. CST Last 4 FPAN: 2345 Thanks

{ "epochTimestamp": 1755169981033, "expiresAt": 1755173581033, "merchantSessionIdentifier": "SSH4ADF1D97A60B47FC8537037BE9892237_FF777A9CB5E9EDAB38A01E4EDF71CB5572F19153853DAC70ADC5AA3E75877CB4", "nonce": "b6f1e016", "merchantIdentifier": "7C52E6BFA112124092008236BE1EE49791E4E82E9082AD9AC98D55B03A088120", "domainName": "1960-ikffk.checkout.trypeppr.com", "displayName": "peppr", "signature": 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"operationalAnalyticsIdentifier": "peppr:7C52E6BFA112124092008236BE1EE49791E4E82E9082AD9AC98D55B03A088120", "retries": 0, "pspId": "7C52E6BFA112124092008236BE1EE49791E4E82E9082AD9AC98D55B03A088120" } This is generated in the onvalidatemerchant event handler, and passed into session.completeMerchantValidation. Using a sandbox account with linked cards, the next thing that happens is a "payment not completed" message in the ApplePay popup on the page, and the oncancel event is hit Inspecting the event, I don't see anything that hints at the issue. There is a sessionError object, but its code is "unknown" and the info object is empty.

We have an Apple Pay account and have successfully created and verified the payment processing certificate in our Apple Developer account. When initiating an Apple Pay payment, the Apple session is created successfully with the correct data return from api , but it is not accepted with the error: “Payment not completed.” The issue occurs even though the merchant validation step works without errors. Our websites where this is happening are: https://magicdeliver.com/ https://www.pulsarmodular.com/ Could you please help us identify the cause of the issue and guide us on resolving it?

We have developed Apple Wallet Extension for our App. The in-app provisioning for the card is working. However when we try to add the card from Wallet extension it gives error saying "Your issuer does not yet offer support for this card". From the apple documentation we can see the issues is same as mentioned in Scenario 2 at following link https://applepaydemo.apple.com/in-app-provisioning#8.4 We are getting eligibilityStatus as 0 Below is the response from Wallet captured using SysDiagnosis https://crt-pod1-smp-device.apple.com:443/broker/v4/devices/0434320BCB1A90022306073796318273728D0A367FA927F4/cards 200 Time profile: 1.77856 seconds { x-conversation-id = ...... Content-Type = "application/json" x-pod = "crt-pod1" x-xss-protection = "1; mode=block" Server = "Apple" x-pod-region = "paymentpass.com.apple" regionbrokerurl = "https://crt-pod1-smp-device.apple.com:443/broker" Date = "Wed, 06 Aug 2025 11:39:30 GMT" Content-Length = "488" x-envoy-upstream-service-time = "1400" Strict-Transport-Security = "max-age=31536000; includeSubdomains" cross-origin-opener-policy = "same-origin" x-keystone-correlationid = ...... x-content-type-options = "nosniff" Vary = "accept-language" x-frame-options = "SAMEORIGIN" } { applicationIdentifier = ......; auxiliaryCapabilities = { }; cardType = 4; deviceProvisioningDataExpected = 1; eligibilityStatus = 0; identifier = ......; learnMoreURL = "https://www.apple.com/ae/apple-pay/banks/ae/en-ae.html"; nonce = ......; paymentApplications = ( { appletTypeIdentifier = Argon; paymentType = Credit; } ); region = "paymentpass.com.apple"; sanitizedPrimaryAccountNumber = 7008; sanitizedPrimaryAccountPrefix = ""; }

Hi, We’re a franchise business with over 100 franchisees, and each franchisee has their own unique Merchant ID. We're building a single app that allows customers to place orders, and based on the selected franchisee, the payment needs to be processed through that specific franchisee’s merchant account. However, when we integrate Apple Pay and publish the app, it asks us to provide a payment gateways' Merchant ID, but we don’t use just one – we have many. How can we handle this situation? Is there a way to dynamically use multiple Merchant IDs in one app, depending on which franchisee the customer is ordering from?

Hello, We are experiencing an issue with Apple Pay integration in our application. We are using WKWebView to handle various payment methods, but we are unable to complete payments via Apple Pay. Upon debugging the WKWebView, we received the following error message: "400 No required SSL certificate was sent" when attempting to process the payment. Currently, we are using a Let's Encrypt SSL certificate. Could you please confirm whether this certificate is suitable for Apple Pay, or if we should be using a different SSL certificate?

Hi, I’ve been trying to integrate Apple Pay, but for some reason, the payment button is not showing up. The project is built with Laravel 11 and Vue. I imported the script as follows: <script crossorigin crossorigin src="https://applepay.cdn-apple.com/jsapi/1.latest/apple-pay-sdk.js" ></script> Then I added the following the steps: <style> apple-pay-button {{ --apple-pay-button-width: --apple-pay-button-width: 150px;; --apple-pay-button-height: --apple-pay-button-height: 30px;; --apple-pay-button-border-radius: --apple-pay-button-border-radius: 3px;; --apple-pay-button-padding: --apple-pay-button-padding: 0px 0px;; --apple-pay-button-box-sizing: border-box; } </style> <apple-pay-button buttonstyle="black" type="plain" locale="en-US"></apple-pay-button> I followed all the steps from the official Apple Pay demo: https://applepaydemo.apple.com/ I also configured the Content Security Policy (CSP) to allow all necessary resources. However, when I test my integration, the button doesn’t appear. I’ve checked the console, but there are no errors. At the same time, I have my certificate imported into the Keychain, and I’ve completed the entire process of creating both the certificate and the private key. However, when I try to validate the session using the certificate and key with Apple’s API, I get an error: 400 The SSL certificate error https://apple-pay-gateway-cert.apple.com/paymentservices/

I'm successfully using Apple subscriptions in my app, but I'm encountering SKErrorCodeDomain error 18 when trying to apply a subscription offer. I want apply offer code first time only for subscription. Below are details of what i set in appstore and what i have tested. Subscription Offer Details Offer Type: For the first month Customer Eligibility: New, Existing, and Expired Subscribers Code Status: Active Offer Code Creation Steps: App Store Connect → App → Subscription → Select Subscription Product → Offer Codes → Add → Add Custom Codes Signature Generation for Promotional Offers I'm following Apple's documentation to generate a signature: https://developer.apple.com/documentation/storekit/generating-a-signature-for-promotional-offers I’ve constructed the payload as instructed: appBundleId + '\u2063' + keyIdentifier + '\u2063' + productIdentifier + '\u2063' + offerIdentifier + '\u2063' + appAccountToken + '\u2063' + nonce + '\u2063' + timestamp Keys and Identifiers keyIdentifier, issuerId, and .p8 file are obtained from: App Store Connect → Users and Access → Integrations → In-App Purchase Test user created under: App Store Connect → Users and Access → Sandbox → Test Accounts Logged in with this account on the iPhone What I’ve Tried Verified all values used in the payload are correct Tried both seconds and milliseconds for the timestamp (as per documentation, it should be in milliseconds) Tried setting appAccountToken to: a valid UUID an empty string not setting it at all Used Apple’s sample code to generate a signature: https://developer.apple.com/documentation/storekit/generating-a-promotional-offer-signature-on-the-server Verified the generated signature locally, and it validated successfully: https://developer.apple.com/documentation/storekit/generating-a-signature-for-promotional-offers#Validate-locally-and-encode-the-signature Apple’s sample code to generate a signature Downloaded from const express = require('express'); const router = express.Router(); const crypto = require('crypto'); const ECKey = require('ec-key'); const secp256k1 = require('secp256k1'); const uuidv4 = require('uuid/v4'); const KeyEncoder = require('key-encoder'); const keyEncoder = new KeyEncoder('secp256k1'); const fs = require('fs'); function getKeyID() { return "KEYIDXXXXX"; } router.post('/offer', function(req, res) { const appBundleID = req.body.appBundleID; const productIdentifier = req.body.productIdentifier; const subscriptionOfferID = req.body.offerID; const applicationUsername = req.body.applicationUsername; const nonce = uuidv4(); const currentDate = new Date(); const timestamp = currentDate.getTime(); const keyID = getKeyID(); const payload = appBundleID + '\u2063' + keyID + '\u2063' + productIdentifier + '\u2063' + subscriptionOfferID + '\u2063' + applicationUsername + '\u2063'+ nonce + '\u2063' + timestamp; // Get the PEM-formatted private key string associated with the Key ID. // const keyString = getKeyStringForID(keyID); // Read the .p8 file const keyString = fs.readFileSync('./SubscriptionKey_47J5826J8W.p8', 'utf8'); // Create an Elliptic Curve Digital Signature Algorithm (ECDSA) object using the private key. const key = new ECKey(keyString, 'pem'); // Set up the cryptographic format used to sign the key with the SHA-256 hashing algorithm. const cryptoSign = key.createSign('SHA256'); // Add the payload string to sign. cryptoSign.update(payload); /* The Node.js crypto library creates a DER-formatted binary value signature, and then base-64 encodes it to create the string that you will use in StoreKit. */ const signature = cryptoSign.sign('base64'); /* Check that the signature passes verification by using the ec-key library. The verification process is similar to creating the signature, except it uses 'createVerify' instead of 'createSign', and after updating it with the payload, it uses `verify` to pass in the signature and encoding, instead of `sign` to get the signature. This step is not required, but it's useful to check when implementing your signature code. This helps debug issues with signing before sending transactions to Apple. If verification succeeds, the next recommended testing step is attempting a purchase in the Sandbox environment. */ const verificationResult = key.createVerify('SHA256').update(payload).verify(signature, 'base64'); console.log("Verification result: " + verificationResult) // Send the response. res.setHeader('Content-Type', 'application/json'); res.json({ 'keyID': keyID, 'nonce': nonce, 'timestamp': timestamp, 'signature': signature }); }); module.exports = router; Postman request and response Request URL: http://192.168.1.141:3004/offer Request JSON: { "appBundleID":"com.app.bundleid", "productIdentifier":"subscription.product.id", "offerID":"OFFERCODE1", "applicationUsername":"01234b43791ea309a1c3003412bcdaaa09d39a615c379cc246f5f479760629a1" } Response JSON: { "keyID": "KEYIDXXXXX", "nonce": "f98f2cda-c7a6-492f-9f92-e24a6122c0c9", "timestamp": 1753510571664, "signature": "MEYCIQCnA8UGWhTiCF+F6S55Zl6hpjnm7SC3aAgvmTBmQDnsAgIhAP6xIeRuREyxxx69Ve/qjnONq7pF1cK8TDn82fyePcqz" } Xcode Code func buy(_ product: SKProduct) { let discountOffer = SKPaymentDiscount( identifier: "OFFERCODE1", keyIdentifier: "KEYIDXXXXX", nonce: UUID(uuidString: "f98f2cda-c7a6-492f-9f92-e24a6122c0c9")!, signature: "MEYCIQCnA8UGWhTiCF+F6S55Zl6hpjnm7SC3aAgvmTBmQDnsAgIhAP6xIeRuREyxxx69Ve/qjnONq7pF1cK8TDn82fyePcqz", timestamp: 1753510571664) let payment = SKMutablePayment(product: product) payment.applicationUsername = "01234b43791ea309a1c3003412bcdaaa09d39a615c379cc246f5f479760629a1" payment.paymentDiscount = discountOffer SKPaymentQueue.default().add(payment) } Issue Even following instructions to the documentation and attempting various combinations, the offer keeps failing with SKErrorCodeDomain error 18. Has anyone else experienced this? Any suggestions as to what may be amiss or how it can be corrected?