Please be kindly informed that normally, when using Vietnam visa on arrival, you will need to go through two gates at Vietnam airport to complete your immigration procedure: VOA counter and Passport Control gate.
With the VOA fast-track service, our staff at Vietnam airport will assist you to get visa stamped quickly at the first gate – VOA counter. And then you will go through the second gate and complete the procedure there by yourself.
However, with the VIP service, our representative at Vietnam airport will assist you to go through these two gates quickly.