Can we clear the customs without form e

There is no hard and fast rule for exporting to Vietnam that only form e certificate of origin can be used for customs clearance and pick-up without form e certificate of origin. Why do we still need form e certificate of origin? Or customers require that form e certificate of origin be required before customs clearance. The main purpose is to provide form e certificate of origin E certificate of origin customers can enjoy preferential tariff when customs clearance. In the actual trade process, even if the customer requires to provide, we should take the initiative to apply for form e certificate of origin for customs clearance, which can reduce the import cost of customers and promote secondary cooperation.