Originally Posted by
Majuki
It depends. There are some multi-currency ATMs that use Visa or MC exchange rates. If it is trying to fix a USD/MXP exchange rate, it was DCC. If it dispensed both MXP and USD but applied the exchange rate from the payment networks then it wasn't DCC. I encountered such an ATM in the Turkish part of Nicosia that dispensed Euros, Pound Sterling, and Turkish Lira but used Visa's exchange rate. Another case was a Barclay's ATM in Gibraltar that dispensed both GBP and EUR. I haven't been to Puerto Vallarta, but don't many of the tourist places accept (our perhaps even prefer) USD?.
I think they do, but at a worse exchange rate (10-12 MXP for every $1) vs the current rate of ~15 to 1.
Also FYI to everyone, the ATMs in Mexico are really big into stuff like being able to donate to charities and "theft protection", which I got bit with at the airport. The HSBC ATMs were of the charity donation type and I was able to easily opt out, but the Scotiabank one at the airport was misleading.