Technical Transfer Guide

Before Transfer: 1. Generate app-specific shared secret in App Store Connect 2. Document the shared secret securely 3. Share the secret code with the recipient 4. Ensure recipient has systems ready to handle subscription verification During Transfer: - Maintain existing subscription verification systems - Keep original shared secret active - Monitor subscription status and renewals After Transfer: 1. Recipient must generate new app-specific shared secret 2. Update server endpoints for subscription verification 3. Implement new shared secret verification 4. Monitor subscription renewal rates for anomalies Critical Considerations: • Original shared secret remains valid until replaced • Server-side subscription verification must be updated • Receipt validation needs to be maintained throughout • Subscription groups may need reconfiguration

Technical Implementation: 1. Document current keychain access groups 2. Map out all stored credentials 3. Plan for authentication token migration 4. Prepare re-authentication flows Migration Strategy: • Consider temporary non-keychain storage • Implement graceful re-authentication • Test with various user scenarios • Monitor authentication failures User Impact Mitigation: - Plan for one-time re-login requirement - Prepare user communication strategy - Implement automatic token migration where possible - Monitor authentication analytics

Pre-Transfer Requirements: 1. Generate transfer identifiers for all users 2. Ungroup apps if part of app groups 3. Document all Service IDs 4. Prepare server-side changes Implementation Steps: • Use Apple's REST API for transfer IDs • Update server endpoints • Test authentication flows • Monitor user sign-in status Post-Transfer Tasks: - Verify all user accounts - Test sign-in flows - Monitor authentication success rates - Update any related services

Certificate Management: 1. Document all certificates 2. Export necessary certificates 3. Prepare new certificate generation 4. Plan migration timing Implementation Process: • Generate new certificates • Update server configurations • Test notification delivery • Monitor delivery rates Verification Steps: - Test all notification types - Verify delivery success rates - Monitor token validity - Check background refresh