Hello, We are investigating a discrepancy during an auto-renewable subscription test in Apple’s Sandbox. We would appreciate guidance on read-only diagnostics that preserve the original attempt. Environment: A development-signed, unpublished QA app on a physical iPhone, separate from our production app. A monthly auto-renewable subscription. The original purchase flow uses RevenueCat. The Apple purchase sheet displayed “Environment: Sandbox” and indicated that no charge would occur. Observed behavior: After entering the Sandbox account password, the tester reported seeing a purchase-completion message. The app subsequently displayed a cancellation message. We did not capture a verified StoreKit success transaction, so we cannot establish that the purchase actually completed. The dedicated QA RevenueCat project showed no purchases or subscriptions, and no actual purchase webhook arrived. The next day, subscription management for the same Sandbox account showed no subscription for this QA app. Read-only investigation: RevenueCat’s purchase and subscription queries returned HTTP 200 with empty results and no additional page. We updated the same app, retaining its bundle identifier and installation, with a native StoreKit diagnostic. Enumerating StoreKit.Transaction.all completed normally with zero results. There were no unverified results, filtered-out transactions, timeouts, or count limits. This diagnostic did not invoke purchase, synchronization, or transaction-finishing operations. One earlier restore attempt also returned no purchase. We have not made another purchase, cleared purchase history, or recreated the Sandbox account. We understand that an empty result in this app context does not prove that no transaction exists anywhere in Apple’s systems. No transaction identifier or signed transaction has been recovered. Questions: What read-only checks can distinguish an incomplete or cancelled purchase from an account/environment mismatch or a transaction-delivery issue? Is there a supported way to investigate the original attempt without a transaction identifier and without making another purchase? Which existing device logs or diagnostic captures would be useful? If investigation requires identifiers or unredacted diagnostics, what private Apple reporting channel should we use? Our goal is to investigate the original attempt while preserving purchase history and leaving production untouched. Thank you.