> For the complete documentation index, see [llms.txt](https://docs.sign-web.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sign-web.app/developers/technical-details/revoke-certification.md).

# Revoke certification

```
revokeCertification(certificationId: String, signerPubKey: String)
```

Call this function with the same account that previously created the certification passing the two following arguments:

**certificationId:** \
Simply the txid of the certification to revoke.

**signerPubKey:** \
is a String that represents the public key of an account signing the invocation calling this method.

{% hint style="info" %}
To get the public key using waves signer in your webapp you simply need to get it with:\
\&#xNAN;*document.signer.\_userData.publicKey*
{% endhint %}