We regret to say that this type of visa is only applicable for those who travel to Vietnam by air. So you can’t use your approval letter to enter Vietnam by land. In your case, we highly suggest that you should come in person to the Vietnam Embassy or Consulate where you are living or any Vietnam Embassy/ Consulate that is nearest and most convenient for you to apply for your Vietnam visa.
We would like to stress the point that you can’t use approval letter for any other kinds of transportation except for travelling by air. If you have any question about visa types, visa fees, visa procedure, extra services or any other concern, please contact us and we are willing to serve you as our best effort!
Please click here for Vietnam visa inquiry {itpsharepoint}