General information about the reproduction of banknotes:
The Czech National Bank holds only the reproduction rights and not the copyright. Banknote reproductions shall comply with the criteria specified in Decree No. 553/2006 Coll. (see link for legal framework I). Pursuant to the copyright law, anybody who intends to reproduce banknotes must obtain the prior consent of the banknote designer.
For further details, please contact the Czech National Bank directly.