> they don`t use the PIN system in the States.
Apologies, you're quite correct. I knew that chip and pin is in the process of being introduced in the US, but hadn't checked properly:
http://articles.busin...-cards-offering-cards
http://www.pcmag.com/...0,2817,2399772,00.asp
Anyway, I have just received a new Visa debit card today, and it mentions that it can be used anywhere displaying a Visa sign. It further mentions informing the bank of travel dates and destinations in advance to reduce the likelihood of transactions being refused, and further recommends paying for things in the local currency rather than sterling, if offered a choice, to falling foul of the store's own exchange rate, which may vary wildly from the "official" one.