Follow the below steps to get Vietnam Visa on Arrival:
After receiving your payment confirmation, EVietnamvisa will send your visa request to the Viet Nam Immigration Department in Hanoi (A18). They will issue Approval Letter which can be considered as the legal allowance of A18 for your entry. After obtaining the approval, we will forward you a copy by fax or email. Copies of the same document will be forwarded on your behalf to Vietnam Immigration checkpoints at International Airports only, so that when you arrive in Vietnam, the Immigration officers will have those documents on hand and will be able to issue your entry visa expediently.