Although not strictly a safety issue, I'm not sure how to classify this question. I've heard something about new European style credit cards that don't exist in the US. Will this be a problem in terms of changing money in banks? Or using them in stores. I'm not referring to 4 numeral pins; it's something else called a 'chip and pin'. Anyone have any problems in that regard?
Also, I have two visa cards. Is there any reason why I need to have a mastercard or is the visa ok?
Thanks.