Visa exemption certificate
is a valid entry and exit document from Vietnam
that is issued to overseas Vietnamese
or foreigners who are spouses and children of Vietnamese citizens.
This paper is valid as a substitute for a Vietnam visa to enter the country for the purpose of visiting relatives and dealing with private matters.
This Visa Exemption Certificate
is valid for the longest period of 5 years and is shorter than the expiry date of a passport or foreign residence document for 6 months. Therefore, if your passport or green card is valid for less than 5 years, the validity of the Visa will not be full 5 years.