An Import General Manifest (IGM) is a document that contains detailed information about the cargo carried on a vessel or an aircraft entering a country. It is a mandatory document that must be presented at the receiving port before the shipment’s arrival. The customs officers double-check the details listed. IGM is confirmation that the shipment has arrived safely at its final destination. It provides a comprehensive list of all the goods being imported, including their description, quantity, weight, value, and other relevant details.