I'm using the Mailchimp subscription plugin for wordpress (v. 1.2.13). It's all ok, I just need to add a checkbox to accept privacy terms. I've created that field through the Mailchimp form managment, it shows and works in the form except that I need to define it as required. There is no option for that in mailchimp, i tried to add a simple "required" attribute in html, but it didn't work (as expected).
Any suggestion?
I've also spotted that Mailchimp define if that field is required in an array/place called $var['req'] that is someway connected with the field name. But I can't find where can I access this array or how to add my custom field to that.