---
title: Added CHALLENGE-INVALID, CHALLENGE-TOKEN-INVALID, and VERIFIED-BOT signals
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2023/09/added-challenge-invalid-challenge-token-invalid-and-verified-bot-signals
---

- Added CHALLENGE-INVALID Signal: indicates a request that included a valid bot challenge token.
- Added CHALLENGE-TOKEN-INVALID Signal: indicates a request that did not include a valid bot challenge token.
- Added VERIFIED-BOT Signal: indicates that a bot has been validated to be what it represents itself to be.