Paper Currency [UPDATED]

: Despite the rapid rise of digital payments, paper currency remains a critical tool for financial inclusion, privacy, and systemic resilience. II. Historical Evolution

: While modern banknotes like the US dollar are fiat money (having no intrinsic value), they serve as the primary medium of exchange in many economies.

: Modern systems use fuzzy logic, image processing, and machine learning to distinguish genuine notes from increasingly sophisticated fakes. IV. Economic Costs and Benefits Costs and Benefits to Phasing Out Paper Currency - NBER paper currency

: Historically, many paper currencies were backed by gold reserves until the mid-20th century; the US officially ended gold convertibility in 1971.

: Promissory notes originated in 7th-century China during the Tang Dynasty to avoid carrying heavy metal coins. : Despite the rapid rise of digital payments,

I. Introduction

: Advanced security paper often contains watermarks, security threads (some with colour-shifting properties), and fluorescent fibres visible only under UV light. Printing Techniques : : Modern systems use fuzzy logic, image processing,

: Sweden's Stockholms Banco issued the first European banknotes in 1661.