Many countries have strict laws when it comes to email marketing which is a good thing. With Mailster you have a tool you can fulfill legal requirements from almost any country on the world. Some countries require you to add a confirmation checkbox where users have to agree that they sign up to your service.

In Mailster you can add a required checkbox via custom fields.

Create a new one like this one. You can also use anchor tags to add a link to your TOS.

Make sure the the checkbox is not checked by default.

Now add your custom fields to your form on the form edit page:

You can define an optional Error Message but make sure this field is “required”.

Now users cannot sign up without checking the checkbox on your sign up form.