Central banks that issued new banknotes between 2021 and 2026 are more likely to make use of clear sections or transparent windows as a security feature, the Currency Benchmarks 2026 find.

Eleven (64.7%) of 17 respondents that produced new banknote series in those years say they incorporate the security feature in their banknote designs. Less than half of those that produced between 2015–2020 (45.5%) utilise the security enhancement. Central banks whose new banknotes were issued between 2009