Originally Posted by
M60_to_LGA
This isn't exactly DCC, but one thing I have seen is hotels that quote you a rate and charge your credit card in USD, even if that isn't the country's local currency. I had this happen in Uruguay and Israel - the hotel would list its rate as USD60 or whatever, the charge slip would be in USD, and the transaction would hit my card in USD for the exact same amount. So there was nothing underhanded - they just had a parallel currency system for those transactions.
Multi currency conversion
This can also be a source of abuse - Airbnb (at least used to) forcing the multi currency conversion based on user locale and adding a 3% surcharge no matter what the property was listed for in local currency.