If you are planning a multiple-entry visit or a stay of more than 30 days, you will want to apply for a visa on arrival. To do this you'll need: 1. A 4x6 passport photo with a white background and no glasses 2. A filled-out visa application form 3. A passport or substitute ID valid for six months from the date you plan to enter Vietnam 4. Payment (25 USD to 50 USD) for visa fees, and 5. A Letter of Approval from a Vietnamese embassy or consulate (if you are picking up your visa at the airport) If you are close to the Vietnamese embassy or consulate, you can submit your photo, application form, passport, and visa fee in person. This website will guide you through the process. If you are unable to reach a Vietnamese embassy or are short on time, there are trusted services online that can provide you with a valid Letter of Approval for a fee. Bring this letter together with a visa application form and your other documents to the Visa on Arrival counter at the airport when you land.