- Foreigners regardless of their respective nationality have to apply visa to Vietnam, except those who enjoy visa exemption
– Visa should be obtained BEFORE boarding a plane/ship from Hong Kong.
– Visa applications can be submitted to our Office directly or by a third party. There is no need of authorization letter but a third party has to show his/her HongKong ID/Macao ID or passport.
– All visa holders can enter Vietnam on or after the arrival date indicated in the visa and must depart Vietnam on or before the expiry date of the visa.
https://vietnamvisainhongkong.wordpress.com/2014/08/18/application-form-for-vietnam-visa-in-hongkong/
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Vietnam Embassy Pretoria