How Banknotes Prevent Counterfeiting

Tap a feature to see how it works.

Watermarks

A faint image embedded in the paper itself during manufacturing, visible only when held up to light, which is extremely difficult to reproduce using standard printing or photocopying methods.

Security Thread

A thin strip embedded within the banknote paper, often visible as a dark line when held up to light, sometimes containing microprinted text or a design that is nearly impossible to replicate convincingly.

Color-Shifting Ink

Special ink that appears to change color when the banknote is tilted at different angles, a visual effect that is extremely difficult and expensive to reproduce without specialized equipment.

Microprinting

Extremely small text printed on the banknote, often too tiny to read with the naked eye, which becomes blurry or illegible when reproduced by standard copying or scanning equipment.

Raised (Intaglio) Printing

A specialized printing process that creates a slightly raised, tactile texture on certain parts of the banknote, which can be felt with a fingertip and is difficult to replicate with conventional flat printing.

Holograms and Optically Variable Devices

Some banknotes include holographic strips or patches that display shifting images or colors depending on the viewing angle, adding another layer of difficulty for counterfeiters.

Layered security rather than a single defense

Modern banknotes typically combine several of these features together rather than relying on any single security measure, since a counterfeiter who manages to replicate one feature convincingly is very unlikely to be able to replicate all of them at once.

Frequently Asked Questions

What is the easiest way for an ordinary person to check if a banknote is genuine?

Tilting the note to check for color-shifting ink and holding it up to light to check the watermark and security thread are two of the simplest checks a non-expert can perform without special equipment.

Do all countries use the same anti-counterfeiting technologies?

No — while many of the same general categories of features (watermarks, security threads, and so on) are widely used, the specific designs and technologies vary significantly by country and currency.