Official Invoices Some
some countries require that all goods imported should be accompanied by an invoice signed by their consul in the exporting country. Details concerning such countries' invoicing requirements are in Croner's Reference Book for Exporters
Croner's will also give information about certificates of value and Croner's will also origin (see page 79). These are invoices which guarantee the country of origin of the goods. They are intended to help the customs of the importing country assess goods for duty. This invoice often requires detailed breakdowns (see bottom of form opposite) of the cost of the goods into raw materials, labour, to processing in the factory, freight, insurance and packing. It has to be signed officially by the exporters or the Chamber of Commerce.
The main idea is to prevent exporters from giving false declarations of the value of goods. For instance an exporter might make an agreement with importer to give only half the value of the goods so as to reduce the importers Naturally the details on all invoices for one consignment must be the same.