A one-month renewable visa will generally be issued. Multiple entry exit visas, which are valid for three to six months may be obtained for visitors who have regular business in Vietnam. It is dependent on each case; 6-month visa could be issued to visitors such as prestige tourism agencies or investors who are making investments in Vietnam. In order to make the process of obtaining a visa easier for tourists and business travelers, the Vietnamese Immigration Department has allowed for E-visa or so called Visa upon arrival. E- visa allows the traveller to apply for an approval letter from the Vietnamese Immigration Department online.