ERROR: Message Undeliverable
Are you seeing this error when sending messages: ERROR: Message Undeliverable?
This means WhatsApp was unable to deliver your message to a recipient.
Let’s look at why this happens and what you can do about it.
Why do you get this error?
This error can occur due to any of the reasons given below:
- The recipient phone number is not on WhatsApp
If a recipient’s phone number is not registered with WhatsApp, they will not receive your message.
- The recipient has blocked your number
If a recipient has blocked your phone number or is unable to send messages to you, your message will not be delivered.
- The recipient has not accepted WhatsApp’s latest terms and conditions
If a recipient has not accepted WhatsApp's new Terms of Service and Privacy Policy, they will not receive your message.
- The recipient is using an outdated version of WhatsApp
Messages will not be delivered if the recipient is using an outdated version of WhatsApp. They must be using the following version or higher:
- Android: 2.21.15.15
- WhatsApp Business App (Android): 2.21.15.15
- iOS: 2.21.170.4
- WhatsApp Business App (iOS): 2.21.170.4
- KaiOS: 2.2130.10
- WhatsApp Web: 2.2132.6
How to fix this error
There is no direct fix for this error from your side because it occurs due to specific issues on the recipient’s end.
However, if you suspect that the issue is not related to a blocked number or the recipient not being on WhatsApp, you can use a different channel and ask the recipient to:
- Confirm that they can send a message to your WhatsApp Business phone number.
- Confirm that they have accepted WhatsApp’s latest Terms of Service (Settings > Help, or Settings > Application information will prompt them to accept the latest terms and policies if they haven't already).
- Update to the latest version of the WhatsApp app on their device.
These steps should allow you to send a message successfully to the recipient next time.
Updated on: 26/06/2025
Thank you!