WhatsApp Error: “Message failed to send because more than 24 hours have passed since the customer last replied”
WhatsApp 24-Hour Customer Service Window Error
This error occurs when you try to send a WhatsApp message to a customer after the 24-hour customer service window has expired. WhatsApp enforces this rule to protect users from receiving unsolicited messages.
What Is the 24-Hour Window?
- The 24-hour window starts when a customer sends you a message.
- Within this window, you can send free-form messages (normal replies).
- After 24 hours of inactivity from the customer, the window closes.
Why This Error Happens
You'll see this error when:
- The customer has not replied in the last 24 hours, and
- You are trying to send a regular message instead of an approved template message
How to Resolve This
1 | Use a WhatsApp Template Message Once the 24-hour window is closed, you must send a pre-approved template message to re-initiate the conversation.
After the customer replies to the template message, the 24-hour window reopens. |
2 | Ask Customers to Reply If possible, prompt customers (via other channels like email or SMS) to:
|
Best Practices
- Respond to customers promptly within the 24-hour window
- Use automation or workflows to avoid delays
- Set up template messages for re-engagement scenarios
Important Notes
- You cannot bypass the 24-hour rule.
- Sending repeated messages without templates will continue to fail.
- This is a WhatsApp policy, not a system limitation.