That's interesting, since as we know, the USD is in widespread use in Cambodia & is even issued from bank ATMs.

Checking further, Transferwise have a list of countries that we can send money to via the Transferwise network.
https://transferwise.com/help/articl...-can-i-send-to
Including Thailand & Vietnam, but not Cambodia or Laos.


If we click the link at the bottom of the page on sending USD to countries outside the US, it states that the Swift Network is used and there may be additional fees charged by the receiving bank.

So transfers to anywhere not on their list might get rather expensive.