Your Debit/Credit/other card has your name printed on it. What if you have non UTF-8 characters in your name (i.e. international characters, ę). Are these printed correctly, if so how do you enter on name on online sites? If not how are they shown?
It kinda doesn't matter if the name doesn't match up. I always forget to put my middle initial (which is on the card) and my mum puts Sue rather than Susan. Just try putting the none accented versions. The worst that will happen is the card will be declined and you'll have to reorder. Right?