What Is the Oman Peppol Five-Corner Model?  The Oman Peppol Five-Corner Model is the technical e-invoicing architecture adopted by the Oman Tax Authority (OTA) for the Fawtara system. Building on the traditional Peppol four-corner model used globally, Oman adds a fifth corner the OTA clearance platform through which all Fawtara invoices must be validated and […]