Issued in 1993, a 2,000,000 million Polish banknote was the last in a series to deal with Poland’s hyperinflation. It is now worth $67 but becomes worthless on 01 January.
"On January 1, 1995, the Polish zloty got a new official code, PLN (the “N” stands for new) instead of PLZ, and dropped four zeros. Unlike many other denominations and currency switches, both currencies were allowed in circulation for a full two years, until the end of 1996."