Do people have to fill out a form to be identified?

Tend does have a way to identify people even if they don’t fill out a form.

It’s called Auto ID and you can read more about it here: https://tend.io/blog/auto-id-website-visitors

You DO though have to know their email ahead of time and they have to click on a unique tracking link that you send them in an email

Here’s an example of how you could to that with your Mailchimp email list:

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