The Hungarian 10.000 forint banknotes will be invalid at the end of this year.
The National Bank of Hungary set the date for the withdrawal of the old bills, in February this year.
The security features of the banknote were upgraded in late 2014.
After 31 December, the old notes can still be exchanged at banks and post offices for a period of three years, and at the National Bank of Hungary for a period of 20 years.
The new upgraded 10.000 forint bills already make up for 95% of all the 10.000 forint banknotes that are in circulation.
A programme to upgrade the Hungarian banknotes was launched in 2014 by the National Hungarian bank.
The last enhanced bill was the 500 forint note, that went into circulation in February this year.