3. Consular Invoice 4. Manufactures' Invoice 5. Proforma Invoice The proforma invoice is an invoice sent for form's sake. It serves as a price reference and enables the buyer to make the necessary preliminary arrangements, such as obtaining an import license.3. Consular Invoice 4. Manufactures’ Invoice 5. Proforma Invoice The proforma invoice is an invoice sent for form’s sake. It serves as a price reference and enables the buyer to make the necessary preliminary arrangements, such as obtaining an import license