Many business and personal applications use VAT (Value Added Tax)
ID Numbers for several purposes (In many countries, this is also the tax
payer's ID number).
It may only be one non-required field in
the customer database, as well as an mandatory field which must be
always correctly filled with reliable data.
This Control is an input box for EU (European Union) VAT ID Numbers, allowing
the user to select the EU Country and type the VAT Number, checking if
it is a valid number for the selected country.
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