Yes, visa on arrival is NOT VALID for OVERLAND ENTRY. The three international airports in Vietnam that you can receive your visa stamp with this approval letter are: Noi Bai International Airport (Hanoi), Tan Son Nhat International Airport (Ho Chi Minh City) and Danang Airport (Da Nang).

Note: If you plan to enter Vietnam by land or cruise, please visit a Vietnamese embassy to get your visa.