Determining the authenticity of sterling money, particularly banknotes, primarily involves checking for specific security features embedded within the notes. The Bank of England designs its banknotes with a range of innovative features that make them difficult to counterfeit but easy for the public to verify.
Key Security Features on Sterling Banknotes
Modern sterling banknotes, especially the polymer series, incorporate several advanced security elements. Two crucial features, common across all denominations, are the metallic image over a window and the specific colors of the foil.
The Metallic Image and Window
Genuine Bank of England banknotes feature a large, clear window that contains a metallic image. This image is a key indicator of authenticity.
- Window Clarity: The window should be transparent and integrated seamlessly into the note.
- Metallic Image Detail: The metallic image itself should be sharp and clearly defined.
Foil Color Verification
The color of the metallic foil on the front and back of the banknote is a specific indicator of its denomination and authenticity.
| Denomination | Front Foil Color | Back Foil Color |
|---|---|---|
| £5 note | Gold | Silver |
| £10 note | Gold | Silver |
| £20 note | Gold and Blue | Silver |
| £50 note | Gold and Green | Silver |
When checking, observe how the foil changes color or pattern when tilted.
Other Important Security Checks
Beyond the primary metallic image and foil, several other security features are present on genuine sterling banknotes:
- Watermark: Hold the note up to the light to see a clear portrait of the King (or Queen on older notes) and the denomination appear faintly in the unprinted area. This should be distinct and not just a printed image.
- Raised Print (Tactile Features): Run your finger across the note. You should be able to feel raised print, particularly on the words "Bank of England" and the large numerals. This is a common feature on genuine currency.
- See-Through Register: On polymer notes, aligned shapes or patterns can be found on both sides of the note. When held up to the light, these shapes should combine perfectly to form a complete image, such as a £ sign or a specific symbol.
- Ultraviolet (UV) Features: Under a good quality UV light, the note's value should appear in bright red and green numbers, while the background remains dull. Other features, like specific patterns or fibers, might also glow.
- Microlettering: Using a magnifying glass, inspect areas like around the King's/Queen's portrait or other detailed sections. You should find tiny, sharp lettering, such as "Bank of England" or the denomination, which is almost impossible for counterfeiters to replicate perfectly.
- Hologram/Kinegram: Many notes feature a hologram or kinegram that changes image or pattern when the note is tilted. For example, on some notes, a specific image might switch between different symbols or numbers.
For more detailed information and visual guides on checking specific denominations, you can refer to the official resources provided by the Bank of England.
What to Do if You Suspect a Forgery
If you believe you have received a counterfeit sterling banknote:
- Do not attempt to pass it on to someone else, as this is a criminal offense.
- Contact the police immediately. Provide them with as much information as possible about how you received the note.
- Handle the note as little as possible to preserve any potential forensic evidence. Place it in an envelope or clear plastic bag.
Always remain vigilant and familiarise yourself with the security features of the banknotes you commonly handle.
