1) Navigate to the Extensions tab in the MoonClerk dashboard
2) Click on the Mailchimp Pro extension
3) In the Form Connections section, click on the form whose connection settings you’d like to edit
4) Click Yes in the Opt-in section. Then, type in your Opt-in message.
4) Click Save
5) Your payers will now be required to check the opt-in checkbox in order to be added to your Mailchimp Audience list.