Answer given by Mr Rehn on behalf of the Commission
Legally, both the European Central Bank (ECB) and the central banks of the euro area Member States have the right to issue euro banknotes. In practice, only the national central banks physically issue and withdraw euro banknotes. As for euro coins, the legal issuers are the euro area Member States. The Commission coordinates all coin matters at euro area level. Hence, at the moment of issuance, euro banknotes and coins belong to the Eurosystem and euro area Member States respectively. Once issued, euro banknotes/coins belong to the holder of such notes and coins, whose account has been debited accordingly. As regards the seignorage revenues, they are shared among national central banks and the ECB according to a ‘banknote key’ based on the ECB capital subscription key for banknotes. For coins, they are retained by each euro area Member State.
-  However, depending on the pre-euro legal traditions, in a few euro area Member States, the holder is considered to only own the underlying value but not the object itself which remains a public good.