# How do you add authentication to your request?

The authentication feature has two options:

1. Email OTP (One Time Password)
2. Access code

Check out how each authentication type works:

<details>

<summary><strong>OTP (EMAIL/SMS)</strong></summary>

*A six-digit verification code auto-generated by the Evia Sign.* You have the option of sending this OTP to the signatory's phone number, the email address, or both.

</details>

<details>

<summary><strong>Access code</strong></summary>

The signature requester *can specify a verification code of their choice. In this case, the verification code will be directly communicated to the signatory(s).*

</details>

Follow the detailed steps below to set up authentication:

* Select the signatory to whom you want to set up the authentication option and enable authentication by clicking the toggle switch to activate the feature.

![](https://627660952-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FNIlngTYM9Z8O6hJJLEe3%2Fuploads%2F8wbbC2wm9IRAIMfHbIS6%2F23.png?alt=media\&token=5feadd4b-7b2b-460c-9acb-d1c05c208e95)

* Select one of the authentication options.

![One Time Password (OTP)](https://627660952-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FNIlngTYM9Z8O6hJJLEe3%2Fuploads%2FEsEN4t1GRB8CTV6Ivw7y%2F24.png?alt=media\&token=af8134b5-5b8f-41f7-9a0e-260515aa4ec4)

![Access Code](https://627660952-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FNIlngTYM9Z8O6hJJLEe3%2Fuploads%2FXPFEqt1HbVwQlP3wroRi%2F25.png?alt=media\&token=47cce4fd-30c5-4409-8879-8cf1eb5dd472)

* This action will assure that an email OTP or an access code is always requested from the signatory when proceeding to open and sign the document.

{% hint style="info" %}
In the case of multiple signatories, follow the same procedure.
{% endhint %}