Originally Posted by
hightide
After I tapped my card, the merchant took hold of the machine. I have a feeling the DCC prompt did appear and the merchant quickly selected it.
If you didn't have control of the machine until the receipt printed, I suspect that the merchant selected DCC for you. Regardless, you weren't given the option, and I would charge back both transactions.
There have been implementations that don't show a prompt, but that doesn't appear to be the case here.
To be safe, I would insert your card to generate a signature slip.