I'm quite confused about their mail as well. But the main reason that they can not provide the documents because there is no invoice when we import goods, as we all know the law of Vietnam.
I'm quite confused with their mail as well, but the main reason they could not supply the documents, because there are no invoices in the episode we import goods as we know well the laws of Viet Nam.
I am quite bewildered with the letter as well, but their main cause they are not able to provide documents as they do not have at the time of the message is no longer available for US imports of goods in accordance with the law in accordance with article we know of Vietnam