Counterfeit Corner

What is the primary reason that most countries issue a new banknote to replace an older design? To help prevent COUNTERFETING!

When a central bank makes the decision to upgrade a banknote, or series of banknotes, they should assess how the current design is performing in circulation. This includes looking at counterfeits to understand how each feature is simulated, as well as the materials and techniques being used.

This will enable the central bank to design a new banknote that contains the appropriate features to deter counterfeiting based on the counterfeiting methods used in their country.

Let’s say that a 50 denomination genuine windowed security thread has been harvested onto a 500 denomination counterfeit. This has happened because the security thread is the same in all the denominations. How could you deter this methodology in a new design?