While we will miss your presence on Change.org, we make closing your account easy. Simply visit your account settings page and click on Close account.
Keep in mind that closing your account is permanent and you cannot sign up for a new one with the same email address. All of your history and any friends you added will be gone for good. Should you wish to return to Change.org after your original account is closed, go to change.org/login_or_join and follow the prompts.