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.
Your e-visa will be valid on those dates you have stated in your application as your entry date. Once you have the e-visa, you can immediately enter Vietnam within the specified period.
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.
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.