I didn't see a form for DCC issues. I just used Chase secure messaging about the card in question. At the time that was also the rec in a FT thread. Assuming I didn't miss it, maybe they've had enough of these complaints to create a form? I've found the secure messaging is pretty quick results with Chase. Now that I am thinking about it, I may have disputed the transaction and sent a secure message. But I never saw a form to fill out