Probable Causes
- Recipient phone is switched off or out of coverage
- Recipient is roaming without active data
- User uninstalled WhatsApp
- Anti-spam rate limiting holds messages in queue
Messaging & Delivery
200 OK (Async Failure)
Why WhatsApp Broadcasts Fail to Deliver & How to Fix (2026 Guide)
A broadcast status staying at Sent (single tick) rather than Delivered (double tick) indicates that the message departed Meta servers but was not received on the user handset.
Step-by-Step Resolution
Recommended Fix Protocol:
Monitor webhook delivery callbacks. Purge numbers that remain on single tick for >24 hours. Schedule broadcasts during active daytime hours (10:00 AM–8:00 PM IST).
Technical Example / Code Payload:
// Webhook Status Callback
{"status": "sent"} // Wait for delivered
Quick Answers
Frequently Asked Questions
Do I pay for undelivered messages?+
No. Meta only charges for delivered conversations.
Why do broadcast lists fail on WhatsApp personal app?+
Personal WhatsApp only delivers broadcasts if the user has saved your contact. WhatsApp Business API delivers to all valid numbers regardless.
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