Some issues concerning your invoices or your account can be solved easier, if the support team is allowed to access your account. Therefore, you can generate a code to grant the agents access.
You can activate a new support session in your Account Settings | Settings | Overview. Below your Master Data is the button for a new support session.
By clicking this button twice, an 8-digit code will be generated. Give this code to a member of support to allow him/her to access your account for 96 hours.