Payment by credit/debit cards is processed by PayPal (US based) and OnePay/ Vietcombank which is the most reliable service in Vietnam.
MyVietnamVisa does not charge any credit card or booking fee.
After payment is made, you will receive an email confirming your order.
Click "Proceed to Payment" will either take you to Paypal or OnePay payment gateway. There, you can choose your card options.