Callback Interface Implementation: Techniques for Handling Duplicate Delivery Receipt Notifications

Duplicate Delivery Receipts: A Common Issue in International SMS Integration

Without proper handling logic on the business side, SMS status statistics become distorted, leading to discrepancies in reconciliation data.

Core Capabilities of the Callback Interface

Idempotency Verification Logic

• Use `messageID` to determine idempotency; immediately filter out and discard duplicate receipts.


• Retain callback request logs, recording the receipt push time and `messageID`.




Fault Tolerance



• Implement exception handling mechanisms to prevent receipt loss during brief service outages.


• Ensure compatibility with the platform's built-in retry mechanisms for callback notifications.




Business Processing Recommendations



• Do not rely solely on the upstream platform to filter duplicate receipts; handle the issue at the source within your own system.


• Regularly verify receipt statistics and promptly investigate any detected duplicates.


• Maintain comprehensive callback logs for reconciliation and troubleshooting purposes.

Optimizing callback interface design ensures accurate SMS status statistics, prevents business logic errors, and minimizes data discrepancies during reconciliation.