Once a work order is completed, an invoice may be issued through Service Automation. An invoice is a financial document that specifies labor, material, and other charges as well as the tax and invoice total amounts. A service provider can issue an invoice only once a work order is either in the Completed or Completed/Confirmed work order status. A facility manager may then review and process invoices: approve, hold, or reject them. An invoice cannot be created without a work order, and each work order can only have one invoice. 
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