Use of currency in Vietnam

Use of currency in Vietnam
Please see below information available from www.fco.gov.uk with regard to local and foreign currency use in Vietnam.
 
The local currency is Vietnam Dong (VND), but US dollars are also accepted. It is almost impossible to change VND into US dollars without a flight ticket showing your onward destination.
Only change money at official money exchange counters with a clear sign showing this status. Illegal exchange places like gold shops may offer a higher rate you may risk losing your money.
Credit cards are becoming more widely accepted, but outside main centres you may find cash the only acceptable currency. It may be difficult to cash travellers’ cheques.
ATMs are available in major cities and tourist areas.
You can have funds transferred to Vietnam via international money transfer companies like Western Union or Moneygram.