I recently bought a $116 Groupon Getaway for a one night stay in Toronto. When I noticed the Visa charge had jumped to $152 I contacted Groupon to ask why the difference. I was told the fine print noted the offer was in US dollars. Note that this particular fine print was not repeated in the order information you have access to once you've purchased the offer. If you missed it up front you don't get a 2nd chance. It turns out the one night cost us more by using a Groupon than if we'd booked through the hotel directly.