Implement Email Verification to Prevent Access With Unverified Emails in Auth0

Last Updated: Oct 5, 2026

Overview

Implementing email verification prevents users with unverified email addresses from continuing after registration or sign-in. Enforce email verification by using a post-login Action to deny access or by sending a verification email using Forms for Actions. This configuration ensures that only verified users access the application and displays an informative message to unverified users.

Applies To

Auth0
Enforce Email Verification
Denied Access
Forms

Solution

How does a post-login Action deny access?

This approach checks the email_verified property after a user signs in. If the email is not verified, Auth0 denies access to the application.

Create a post-login Action and configure it to deny access for unverified emails as detailed in either the video demonstration or the written instructions.

Create a post-login Action.
Within the Action, access the event.user.email_verified property.
If event.user.email_verified is false, use the api.access.deny() method and provide a message that informs the user to verify the email address.

NOTE: This action redirects the user back to the application's callback endpoint. Configure the callback endpoint to parse the error and display a user-friendly message.

Review the following example post-login Action code:

exports.onExecutePostLogin = async (event, api) => {
  if (!event.user.email_verified) {
    api.access.deny('Please verify your email before logging in.');
  }
};

Send a Verification Email Using Forms for Actions

The Forms for Actions feature provides a template for the email verification process.

Review the following requirements and behaviors for this feature.

Administrators must enable the tenant-level Email Provider.
This feature sends a verification email each time the user signs in and the specific Form is invoked.
The feature remains effective even if an initial verification email expires.

Review the following image for an example of the Forms Templates interface.

Forms Templates