US Citizens Now Can Get Vietnam Visa On Arrival At Greenvisa. Briefly say, visa ON arrival is a best-choice alternative method for people around the globe that want to get the visa to Vietnam. Instead of following the tedioUS processes of Vietnam Embassy, you only need to fill out "Online Application Form" and then pay for the visa service charge. US citizens can find more information of VOA on Vietnam Visa US at https://greenvisa.io