in reply to validation regex or functions resources
I'm sure there must exist an international business that will sell you some software or a database, something like the amazon or the google , a service of some sort :)
The keywords are: international, postal, currency, telephony :)
For writing your own you can start at https://en.wikipedia.org/wiki/Postal_address (reference the references)
of interest Geo::PostalCode,Geo::PostalAddress, WebService::GData::Node::GD::StructuredPostalAddress, WWW::BigDoor::Currency, Finance::Currency::Convert::XE, Locale::Currency, Data::Currency, Telephony::CountryDialingCodes, Number::Phone::CountryCode, Number::Phone::, Geo::CountryFlags::ISO
Intenational businesses usually have the resources to put together an unified interface, so the web services are where I would look for a ready-made solution, but I can't imagine you're in that situation :)
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