Stamping fee is the fee you pay directly to Immigration Officers in cash (at Immigration Desk/Counter) at your arrival airport in Vietnam to have your Vietnam visa stamped onto your passport. The fee is collected by Immigration Officers and compulsory for all those who use Vietnam visa on arrival method. The Stamping fee can be paid in USD or VND, etc. but USD is highly recommended to avoid any unexpected unbalanced exchange rates applied at the Vietnam airport. See table above for details.