Our step-by-step guide describes how to configure sponsor registration on your captive portal.
You can let your users register only with a sponsor validating the process.
There are a few ways you can choose to register a user with a sponsored validation.
For this example, we will have the user requesting credentials to a sponsor that will receive a mail for validation containing a URL. After the sponsor opens the URL, the guest will receive a mail with his or her credentials.
Here is what it looks like from the user's perspective:

Here the user enters his name, email, and the sponsor's email. When clicking the button, a mail will be sent to the sponsor.

After the sponsor validates the guest by clicking the URL in the mail, the guest receives his credentials and can put them in sign-in section to log into the Wi-Fi.