Governments of many countries require pre-shipment inspections (PSI). Inspection of imports at the point of supply is mainly designed to protect the interests of the buyers in the international purchasing process. A pre-shipment inspection includes:
Physical identification of the goods in the country of supply/export to ensure that the goods are in accordance with the description declared by the exporter.
Verification of the contract price. This is to ensure that the price is reasonably in line with current export prices from the country of supply or world market prices. Verification of price provides Customs with accurate data for the collection of import taxes and levies.
Customs classification is verified for each imported item to allow Customs to apply the correct tariff rates.
Pre-shipment inspection includes the checking of the commodity against any list of items subject to import regulations.
The extent of each pre shipment inspection procedure according to government requirements. Motivation for the PSI include: improved trade balance, optimize customs revenues, enhance domestic tax revenues, fight fraud and abuses of trade incentives, reliable trade statistics, protection of domestic industry, and consumer protection. Pre Shipment Inspection (PSI) maximises duty collections. By undertaking duty assessment in the country of export, importers have no opportunity to pressurize customs to assign lower rates.

Compliance with the World Trade Organisation (WTO) Agreement on Customs Valuation is now mandatory for all members. Without PSI, countries introducing the Agreement invariably experience a reduction in revenue collections. ensures that the pre shipment inspection agreement is fully implemented as required by the WTO, and in a way that maintains duty revenue collections.

Trade facilitation: inefficient Customs administrations and the failure of importers to comply with import procedures can both delay trade. pre shipment inspection certificate ensures rapid Customs clearance, by undertaking the necessary physical and documentary inspections before the consignment is dispatched.

Pre shipment inspection agencies deters capital flight in countries where exchange controls exist by preventing deliberately inflated invoicing. This can deplete foreign exchange reserves, which can also reduce the taxable income declared by multinational companies. PSI significantly reduces the incidence of illegal imports, such as radioactive waste, by inspecting shipments in the country of export before dispatch.

As a PSI programme takes effect, so a vast database of vital trade information is created, which can be supplied to the Client Government in a variety of pre shipment inspection report formats, as an aid to economic decision making and to induce confidence in donors