An invoice is a collection of charges. Charges can be selected and added to an invoice either in the Topic: Charges (as desribed earlier in this article) or by applying the same action on the charges of a specific service (found at ADMIN.INBOX.SERVICE DETAILS.CHARGES). When the action "Add charge(s) to invoice" is selected, a new window opens where the invoice is crreated. Therefore an ID and a name are needed. Additionally you need to select a status and can add some comments. After creating an invoice it will be found here at ADMIN.BILLING.INVOICED. An invoice can be edited by clicking on the gear wheel symbol. Then the name, status and comments of the invoice can be edited. The sheet symbol with an x allows an export of this invoice to excel. By clicking on the little triangle symbol on the left of the invoice all seperate charges of the invoice can be seen and edited. Please note that not much changes of the charges can be done after it is added to an invoice. But while editing it can be removed from the invoice. The status of an invoice can be changed to "Draft", "Billed", "Paid" and "Waived".