# cf.tls\_client\_auth.cert\_verified

`cf.tls_client_auth.cert_verified` Boolean

Returns `true` when a request presents a valid client certificate.

Also returns `true` when a request includes a valid certificate that was revoked (refer to [`cf.tls_client_auth.cert_revoked`](https://developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/cf.tls_client_auth.cert_revoked/)).

This field is only filled in if the request includes a client certificate for [mTLS authentication](https://developers.cloudflare.com/ssl/client-certificates/enable-mtls/).

Categories:

* Request
* mTLS
