QUESTIONS AND ANSWERS ABOUT EVISA VIETNAM AND VIETNAM VISA I. General questions. 1. What is Evisa Vietnam and Vietnam visa? Vietnam visa is a type of necessary travel document which is granted by competent authorities of Vietnam for providing permission to enter, leave or stay in Vietnam country during a specific time period. And Evisa Vietnam is a kind of visa that is issued via electronic system to foreigners by Vietnamese Immigration Department. 2. Differences between a passport and a visa? A passport is issued for the citizen of countries that has demand to make international trips or business overseas and identification. While a visa is an endorsement that is placed within a passport for holders officially permission to enter, stay or leave Vietnam in a specific time mentioned in the visa. 3. How long is an Evisa Vietnam (Vienam visa) valid for? An Evisa Vietnam is for single entry and valid for 30 days only. However, you can request the visa's validity in only 15 days