When you arrive at the airport in Vietnam must first go to the visa section. Here, you are required to complete and sign the form to receive a visa on arrival and attach photos on this form. Therefore, please prepare two small photos (passport photos standard).
To save time at the airport, we recommended you print the form of entry and exit out, fill information, sing and attached photo in advance. You need to prepare 1 or 2 more photos for other uses.
What happens if you do not have photos? Do not worry, you can ask the officer to get photos directly from the airport to get visa on arrival (2 USD/each).
Warning: Please print the letter of approval of the visa upon arrival at the airport in Vietnam.
Vietnam Visa Team - Vietnamimmigration.Org