The following fields are displayed under the security tab:
Order Notification: check this box if you wish to receive emails indicating that orders have been placed. Please note that the order notifications do not contain actual order information, just a notice that an order has been made.
Notification Email Address: this is a field for the email address which will receive order notifications. This email address will also be used to send you your password if you have forgotten it. It is mandatory that you enter in a valid email address in this field.
Order Processing Username: this is the username you would use to log in and pick up your orders online. It is the same as the domain name of your website.
Order Processing Password/Confirm: when changing the password or entering in a password for the first time, both of these fields must be filled. If what was entered in each field is not identical, the new password will be rejected. For increased security, the password is never shown as clear text.