I have been seeing several websites offering Visa on Arrival for Vietnam. Does it work? Are they genuine? Has anyone have the experience of availing their facility. I am confised as the Vietnam's Govt website does not mention about it like the Cambodian Govt website does.

You can enter Vietnam with visa upon arrival holding Australian passport. If you are going to enter Vietnam with Indian passport, you will need to apply for a visa.

Don't trust those websites...