Just checked into a hotel in Maldives, and they've used DCC (I didn't know it existed until seeing the ridiculous exchange rate) - since it is the pre-auth only, can I ask them to reverse it and charge again with no DCC? I'd like to use this credit card as it has no foreign transaction fees, but even paying with a different card will save me quite a bit. The pre-auth was $500 USD/day, for 5 days so it adds up (my card is a CDN card).