The 1993 versions of the CZK 5,000 and CZK 1,000 banknotes ceased to be legal tender on 1 July 2001. The 1996/2008 versions of the CZK 1,000 banknote and the 1999/2009 versions of the CZK 5,000 banknote remain legal tender
The valid versions of the banknotes differ from the invalid versions in that they contain a graphic symbol, a shiny iridescent strip, orange protective fibres and optically variable ink of a different colour. The invalid banknotes have been exchangeable at offices of the CNB since 1 July 2004 and will remain so until further notice.
Under CNB Decree No. 37/1994 Coll. (pdf, 132 kB), the exchange of invalid banknotes and coins is free of charge at all banks.
However, a prescribed packaging standard must be observed if a large quantity of banknotes is to be exchanged, i.e. the notes must be smoothed and aligned according to side and direction of print and placed in bundles of 100 with a tape around them. For example, if 320 banknotes are to be exchanged, they must be put into three bundles of 100 with a tape around them and the remaining banknotes can be submitted loose. If this procedure is not followed, banks are entitled to charge a fee for work relating to the recounting of banknotes. They are also entitled to charge a fee if banknotes are submitted for exchange unsorted together with other denominations.