The euro banknotes bear the following signature letters to indicate which central bank authorised the printing of the banknotes:
Country letter
Belgium Z
Greece Y
Germany X
Spain V
France U
Ireland T
Italy S
Netherlands P
Austria N
Portugal M
Finland L
Slovenia H
Slovakia E
Cyprus G
Malta F
Estonia D
What does the country code tell us?
The country code printed on euro banknotes (eg X for Germany) indicates the national central bank (NCB) on behalf of which the banknote in question was produced.