Manually adding a contact to your Mailchimp list

https://login.mailchimp.com/

(1) Click on the lists tab
(2) lick add people link

Fill out the form fields. Any field with an * is a required field

At the bottom of this form you will find a check box, you MUST confirm that this person has given you permission to use their contact details.
Then click subscribe, the new contact will have been added.