It is sufficient to create a new authorised contact in the administrator section, for example with the name ´Invoicing´. Insert the e-mail address and have the invoices sent based on your selection. As of that moment, your invoices will be sent automatically also to that e-mail address.

You can change your password in the Control Panel after logging in by clicking Change Password in the upper right-hand corner.

Yes. In the interface you can see all of your services and how you can work with them. For example, for the administration of all of your virtual servers, you now need only one login and one password.

In the left-hand side menu click on User Account, then select Authorised contacts. You can arbitrarily add or remove authorised contacts here.

The following link provides detailed guideline for administration ControlPanel.