When creating your sign up form, you can require subscribers to complete certain fields.
Note: We already make the email address a required field (after all, how could you email them if they didn't give you an email address?).
Step By Step Instructions
- Click on the Sign Up Forms tab in your account.
- You can create a new form, or click the name of an existing one to edit it.
- In the form editor, simply click on the field that you'd like to make required.
- In the popup, check the Required box and click "Save".
Now, just save your form and publish it as normal.