Originally Posted by IAN-UK

I'm guessing you have a US credit card. As you say, the de facto currency for high finance (i.e. most things) is USD. The USD system runs smoothly with credit card transactions in that currency. So DCC is simply not an issue for you.

DCC might come into play for payment with a card not using USD as its native currency (honest, they do exit!), but paying with a UK card I've never had that problem in Cambodia.

I recently stayed in a Budapest hotel. Booked in EUR, billed in HUF and the hotel kindly attempted to slip in a conversion to GBP "for my convenience". Now that's DCC at work