Originally Posted by Kremmen

I used express checkout. I never saw the credit card slip, let alone signed it. Every piece of documentation I have, including the final receipt, is in EUR only. As I mentioned, there are two payment lines that are formatted identically (-EURxxx.xx) even though the first was charged in EUR and the final was charged in USD.

The problem in this case is not that I didn't notice, but that there was never anything for me to notice. (Plus, Chase doesn't bother to put the original currency on its online transaction lookup, so it was not even visible to me until after the statement was issued.)