The document provides steps to check the status of an invoice or document in the Tungsten Portal: 1. Log in to the Tungsten Network portal and search for the invoice number to check its status. 2. The search results will display the document status, number, amount and type. Click the file icon to view details. 3. The status definitions are explained, including actions to take if the status is Pending, Approved, Paid, Rejected or Exception.