Hello there,
– In order to get your Vietnam visa, you have to pay two types of fees: The service fee and stamping fee (both are paid in cash at the airport)

• The Service Fee is paid online (you can consider on the web: https://discoveryindochina.com/payment/secure-payment/) . Most of major credit cards are accepted: Visa, MasterCard, American Express, and Diners Club. However, Virtual card and single use card are not accepted.
• You have to pay Stamp Fees directly at the airport in cash using either Vietnam dong or U.S. dollars

– In Laos: You need to pay fee of about USD 20-45 (Remark: the fee is varied, depending on your nationality). And there is one tip for you when you pay for your visa on Laos airport: the best way to pay for the visa is use US dollars, paying in Thai Baht is more expensive.

Hope the information helpful for you!