To understand what a Vietnam e-visa is, take a look at its features below: The E-visa is a single-entry visa. It will allow you to stay in the country for a maximum of 30 days.
Each individual traveler should have his or her own e-visa copy when entering Vietnam. Therefore, you cannot apply for multiple travelers in one e-visa application.
No, you can only enter in Vietnam within the date specified on your e-visa. If you come earlier than that, you will be denied entry to the country.
You need to contact Vietnam immigration immediately as soon as you have noticed a mistake on your e-visa application. That way, they can rectify your visa and avoid any issues when entering the country.
What if I realized that I made a mistake on my visa application and I have already submitted it? Send an email as soon as possible. They will be able to correct whatever mistake you have entered so you will not get into trouble when entering Vietnam using the e-visa.