Hi, can you add new EU country. Croatia (Hrvatska).
Can you add us in Kartris 
as EU country. If there is anything you need additionaly for adding us. Just ask. Below is function for checking oib/tax id....
In Croatia there is OIB and Tax number... Tax number basicly get companies that work also with companies from outside Croatia..
Only difference between Tax number and Oib is in prefix...
My company's OIB is : 57277786898
Tax number is: HR57277786898
This function checks if OIB is in correct format so, only thing needed is if there are letters in this number, to strip HR and check with this function if its correct format
Public Shared Function OIB_Validacija(ByVal oib As String) As Boolean
If oib.Length <> 11 Then
Return False
End If
Dim znamenka As Integer, zbroj As Integer, medjuOstatak As Integer,
ostatak As Integer, umnozak As Integer
ostatak = 10 For charIndex As Integer = 0 To oib.Length - 2
znamenka = Convert.ToInt32(oib(charIndex).ToString())
zbroj = znamenka + ostatak
medjuOstatak = zbroj Mod 10
If medjuOstatak = 0 Then
medjuOstatak = 10
End If
umnozak = medjuOstatak * 2
ostatak = umnozak Mod 11
Next
Dim kontrolniBroj As Integer = 11 - ostatak If Convert.ToInt32(oib(oib.Length - 1).ToString()) = kontrolniBroj
Then
Return True
Else
Return False
End If
End Function