Hyperinflation

Some banknotes were stamped to indicate changes of denomination, as it would have taken too long to print new notes. By the time new notes were printed, they would be obsolete (that is, they would be of too low a denomination to be useful). Metallic coins were rapid casualties of hyperinflation, as the scrap value of metal enormously exceeded its face value. Massive amounts of coinage were melted down, usually illicitly, and exported for hard currency. There are also issues with computerized money-handling systems. In Zimbabwe, during the hyperinflation of the Zimbabwe dollar, many automated teller machines and payment card machines struggled with arithmetic overflow errors as customers required many billions and trillions of dollars at one time.