WhatsApp guides / Error 131026
WhatsApp error 131026: message undeliverable
Error 131026 means Meta could not deliver your message to that recipient. Meta's documentation gives three possible reasons, all on the recipient's side, and the fix is to reach the person through another channel and ask them to check their WhatsApp.
Based on Meta's official documentation, checked 18 October 2026. Sources are linked at the end; where Meta gives no fix, we do not invent one.
What Meta says it means
Meta describes 131026 as being unable to deliver the message. The reasons it lists:
- The recipient's phone number is not a WhatsApp phone number.
- The recipient has not accepted WhatsApp's new Terms of Service and Privacy Policy.
- The recipient is using an old WhatsApp version. Meta's minimums: Android 2.21.15.15, SMBA 2.21.15.15, iOS 2.21.170.4, SMBI 2.21.170.4, KaiOS 2.2130.10, Web 2.2132.6.
What Meta says to do
Using a channel other than WhatsApp, ask the recipient to:
- Confirm that they can actually send a message to your WhatsApp business phone number.
- Confirm they have accepted WhatsApp's latest Terms of Service. Opening Settings > Help, or Settings > Application information, prompts them to accept if they have not.
- Update to the latest version of the WhatsApp client.