What is a surprising fact about banknotes that most people don’t know?

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Question: What is a surprising fact about banknotes that most people don’t know?

Answer: A surprising fact about banknotes is that they contain a variety of security features designed to prevent counterfeiting. Some of these features include watermarks, holograms, security threads, and color-changing ink.

How is the design of banknotes determined?

Who introduced the first online banking service?