Risk-based assessment governs postal imports screening and clearance, requiring documentary verification and duty payment for delivery. Imported parcels must undergo scanning and inspection and may be selected for examination based on scan results, declared postal forms or risk-evaluation. Electronic Advance Data enables pre-arrival risk-based assessment; otherwise assessment occurs on presentation. The proper officer may require documents for verification and, if satisfied goods are not prohibited, issue an electronic clearance order. Parcels are deliverable only upon payment of applicable duties, with duties for Postal Bill of Import payable via the Customs Automated System by the importer or authorised agent.