"What is proforma Invoice?"
Since I talked with my husband about it yesterday,I checked it up .
Normally, we may think Proforma Invoice as quotation.
In case the import counterpart obligates import admission in advance,
the exporter sends proforma invoice to the importer in order to apply
the import admission. Such a import admission may be required in developing countries ,because their regulation for import or foreign exchange is stringent.
Since the price in proforma invoice may be different from the actual price, proforma invoice may not be accepted as documents for customs declaration.
For more detailed information, please refer
here