"as long as payment clears paypal, and I ship to US address, I am not concerned where the actual owner to be lives.."
This! What Vietnamese doesn't have a US contact, or family member. Have that member pay for the item, you ship to them. They choose to ship to Vietnam, or anywhere in the world, it's their business, not yours. You're not responsible for an item shipped elsewhere after it's been received in the CONUS.
This! What Vietnamese doesn't have a US contact, or family member. Have that member pay for the item, you ship to them. They choose to ship to Vietnam, or anywhere in the world, it's their business, not yours. You're not responsible for an item shipped elsewhere after it's been received in the CONUS.