I was in a bit of a hurry to leave, since the wife and kids were waiting. And I didn't have enough cash with me in case he didn't want to re-process it in CHF.


Thanks for the tip. I will call the card issuer when I'm back in the US this week. I didn't realize that there was a specific chargeback reason for "DCC fraud".

Update: I called the card issuer (US Bank) to request a reason code 76 chargeback, and nobody has ever heard of this or knows how to do this type of chargeback . They escalated my request to a team manager, who will be calling me back.