Visa extension is a term understood that visitors would be allowed to stay in Vietnam according to regulations. Moreover, they will be able to stay for a certain period without having to exit Vietnam and re-enter Vietnam. If the visa is extended, foreign guests will be stamped with an extension of the passport name showing the new period of stay on it as required by law. The extended visa will be valid for one entry. After the extension, if the visitor leaves Vietnam, the extended visa will automatically expire according to regulations.