Originally Posted by arcadata
It's not just a warning email. I think they also do something to your account, so you can't buy anymore more books until you fix your address. There have been posts complaining about that.
I haven't heard of that, but I don't doubt it. The message is because your credit card country doesn't match your Kindle's country. If you really want the US magazines and don't want the message, you can still use one of those credit card gift cards, although I'm not sure how the work in the UK.
Personally, I would change the Kindle's address and buy all the magazines, then wait for the email and change your address back (if required). Amazon still wants your money!