The ideal of course would be to have postcode lookup. The reason, surely for recording the address is either a) to mail the customer something, to let HMRC know who you are trading with and c) to send the police round. In this case, the ISO matters less than the postcode. Users should at least be able to disable this. Michael, it might be best to keep your political opinions to yourself, if I were a pro-eu customer I might decide not to trade with you?