Security Features Checklist: Genuine vs Counterfeit $20 Bills
| Security Feature | How to Check | What You Should See | Common Counterfeit Failures |
|---|---|---|---|
| Paper Texture | Feel the note with fingers | Raised printing, distinctive cotton-linen texture | Smooth or glossy surface, no raised texture |
| Security Thread | Hold to light; use UV lamp | Visible both sides; glows green under UV | Thread missing, wrong colour, or printed on surface |
| Watermark | Hold note up to light | Andrew Jackson portrait visible both sides | No watermark or poorly printed image |
| Colour-Shifting Ink | Tilt note at angle | Numeral 20 shifts copper to green | Colour stays same or changes incorrectly |
| Microprinting | Use magnifying glass on ribbon | Text 'USA20' along blue TWENTY USA ribbon | Blurred text or missing microprint |
| Paper Composition | Feel weight and texture | 75% cotton, 25% linen blend | Regular paper feel, wrong weight |
Security Features of a Genuine $20 Bill
Genuine $20 notes issued from 2003 onwards incorporate multiple layers of security features that work together to prevent counterfeiting. Understanding these features helps you verify authenticity quickly, whether you're handling cash at a retail counter or receiving payment from an individual.
Paper Composition and Texture
The foundation of a real $20 bill lies in its distinctive paper. Genuine notes use a blend of 75 percent cotton and 25 percent linen1, which creates a texture noticeably different from standard printer paper. When you run your fingers across the surface, raised printing gives authentic Federal Reserve notes their characteristic feel2. This tactile quality results from the intaglio printing process used by the Bureau of Engraving and Printing, where ink sits raised above the paper surface rather than absorbed into it. Counterfeiters typically cannot replicate this texture because they lack access to the specialised paper stock and printing equipment.
Embedded Security Thread
Hold a genuine $20 bill up to a light source, and you'll see a security thread running vertically through the note. This thread is visible from both sides of the note2, embedded within the paper rather than printed on the surface. Under normal lighting conditions, you can read text along this thread. When you illuminate the note with ultraviolet light, the security thread glows green2. Counterfeit notes often fail this test entirely—either the thread is missing, printed rather than embedded, or glows the wrong colour under UV examination.
Watermark Portrait
A watermark of President Andrew Jackson appears when you hold the note to light. This watermark is visible from both sides of the note2 and sits to the right of Jackson's portrait on the front. The watermark forms part of the paper itself during manufacturing, not added afterwards through printing. Examine the clarity and detail: genuine watermarks show fine gradations of light and shadow that create a recognisable portrait. Poor-quality counterfeits may lack a watermark entirely, whilst more sophisticated fakes might show a blurred or incorrectly positioned image.
Colour-Shifting Ink
Tilt your $20 bill back and forth whilst watching the numeral 20 in the lower right corner of the front. On a genuine note, this number shifts from copper to green as you change the viewing angle2. This colour-shifting ink uses optical variable ink technology that counterfeiters find difficult to reproduce. If the numeral remains a single colour regardless of how you tilt the note, or if it changes to colours other than copper and green, you're likely holding a counterfeit.
Microprinted Text
Examine the blue TWENTY USA ribbon on the front of the note with a magnifying glass. Along the border of the first three letters, genuine notes include microprinted text reading 'USA20'2. This microprinting appears sharp and distinct under magnification. Counterfeit bills typically cannot reproduce this level of detail—the text either appears as a solid line to the naked eye or becomes blurred and illegible even when magnified. Microprinting serves as a quick verification method when you have access to a basic magnifying tool.
For techniques to verify these features systematically, see How to Spot Counterfeit $20 Dollar Bills: A Step-by-Step Guide.
How to Check if a $20 Bill is Real
Verifying a $20 bill requires a systematic approach that combines tactile, visual, and light-based checks. Each method targets a specific security feature designed to resist counterfeiting, and using multiple tests together gives you confidence in the note's authenticity.
Step 1: Feel the Paper Texture
Begin by running your fingers across the surface of the bill. Genuine $20 notes use paper composed of 75 percent cotton and 25 percent linen1, which produces a texture distinctly different from standard office paper. The surface should feel slightly rough rather than smooth or glossy. Pay particular attention to the raised printing—authentic Federal Reserve notes have a characteristic texture created by the intaglio printing process2. You should feel ridges where ink sits above the paper surface, especially on the portrait, the Federal Reserve seal, and the Treasury seal. If the bill feels slick, overly smooth, or lacks any raised texture, it warrants further scrutiny.
Step 2: Hold the Bill to Light
Position the note between your eyes and a light source such as a lamp or window. Look for two embedded features that become visible when backlit. First, locate the security thread running vertically through the note—this thread is visible from both sides2 and should appear as a dark line embedded within the paper fibres, not printed on the surface. Second, examine the area to the right of Andrew Jackson's portrait for a watermark showing Jackson's face. This watermark is visible from both sides of the note2 and displays fine gradations that create a recognisable portrait. Both features form part of the paper during manufacturing and cannot be added through printing. If either the security thread or watermark is missing, poorly defined, or appears only on one side, the bill is likely counterfeit.
Step 3: Tilt the Note to Observe Colour-Shifting Ink
Hold the bill flat and focus on the numeral 20 in the lower right corner of the front. Slowly tilt the note back and forth, changing the angle between the bill and your line of sight. On a genuine note, this numeral shifts from copper to green2 as you adjust the viewing angle. The colour change should be clear and consistent each time you tilt the note. This optical variable ink technology remains difficult for counterfeiters to replicate accurately. If the numeral stays a single colour regardless of tilting, or if it shifts to colours other than copper and green, you're likely examining a fake bill.
Step 4: Use UV Light to Check the Security Thread
If you have access to an ultraviolet lamp—commonly available at retail counters and currency-handling businesses—illuminate the $20 bill under UV light in a darkened environment. The embedded security thread should glow green2 when exposed to ultraviolet light. This fluorescent response confirms both the presence of the security thread and its correct composition. Counterfeit notes often fail this test because the thread is either absent, printed rather than embedded, or glows the wrong colour. This check takes only seconds and provides strong evidence of authenticity when combined with the previous steps.
These four methods address the primary security features built into $20 notes issued from 2003 onwards. Performing all four checks in sequence—feel, light, tilt, UV—gives you a comprehensive verification that covers tactile, visual, and fluorescent security layers.
What the Security Thread Looks Like on a Real $20
The security thread embedded in genuine $20 bills serves as one of the most reliable verification features, combining visible and ultraviolet-reactive properties that counterfeiters struggle to replicate. Understanding exactly what this thread looks like under different lighting conditions helps you distinguish authentic notes from fakes in seconds.
Appearance Under Normal Light
When you hold a genuine $20 bill up to a light source—whether a lamp, window, or overhead fixture—you'll see a thin vertical line running through the note. This security thread is visible from both sides of the note2, appearing as a dark stripe embedded within the paper fibres rather than printed on the surface. The thread runs vertically, positioned to the left of Andrew Jackson's portrait when viewing the front of the bill. Under normal lighting, you can read text along this thread, though the small size may require close examination or a magnifying glass.
The critical distinction lies in how the thread integrates with the paper. On an authentic note, the thread sits within the paper structure itself, woven in during the manufacturing process. If you examine the thread closely, you'll notice it doesn't sit on top of the paper surface like ink would—it's part of the paper substrate. Counterfeit bills often fail to replicate this embedded quality. Fraudulent notes may show a printed line that attempts to mimic the thread, but such imitations remain on the paper surface and lack the depth of a genuine embedded thread. Some sophisticated counterfeits include an actual thread, but it typically differs in position, width, or the text printed along it.
Fluorescent Response Under UV Light
The security thread's most distinctive characteristic emerges when you illuminate the $20 bill with ultraviolet light. Under UV illumination, the thread glows green2. This fluorescent response provides immediate verification that takes only seconds to perform. The green glow should be bright and consistent along the entire length of the thread, clearly visible even in a dimly lit room.
To conduct this test effectively, position the bill under a UV lamp in reduced ambient lighting—the darker the environment, the more visible the fluorescent glow. Many retail businesses, banks, and currency-handling operations keep UV lamps at counters specifically for this purpose. The green fluorescence results from compounds embedded in the thread material that react to ultraviolet wavelengths. Counterfeiters rarely replicate this feature correctly. Fake bills typically show no fluorescence at all when exposed to UV light, or the thread glows the wrong colour—blue, yellow, or orange rather than green. Some counterfeiters attempt to add fluorescent material to printed threads, but the glow usually appears uneven, patchy, or significantly dimmer than genuine notes.
Why This Feature Matters
The security thread combines two verification methods—visible inspection and UV response—into a single embedded feature. This dual-layer approach makes it particularly effective for quick authentication. You can perform the visible light check anywhere without special equipment, whilst the UV test adds a second confirmation layer when tools are available. Together, these checks address both casual counterfeits that lack the thread entirely and more sophisticated fakes that might include a visible thread but fail the fluorescent test.
When examining a $20 bill you suspect might be counterfeit, always check the security thread alongside other features such as the watermark, colour-shifting ink, and paper texture. No single feature provides absolute certainty, but the security thread's visibility from both sides and its green UV glow offer strong evidence of authenticity when present and correct.
Understanding the Watermark on $20 Bills
The watermark embedded in genuine $20 bills provides one of the most accessible verification features—it requires no special equipment beyond a light source and reveals itself through a simple hold-to-light test. This security element forms part of the paper itself during manufacturing, making it exceptionally difficult for counterfeiters to replicate convincingly.
What the Watermark Shows
When you hold a $20 bill up to light, a watermark of President Andrew Jackson becomes visible from both sides of the note2. This portrait appears to the right of the printed Jackson image on the front of the bill, occupying the blank space that might otherwise seem like wasted paper. The watermark shows Jackson's head and shoulders in a profile similar to the main printed portrait, though the watermark rendering differs slightly in detail and shading.
The watermark creates a recognisable image through variations in paper density rather than through ink or printing. Thicker areas of paper appear darker when backlit, whilst thinner areas allow more light to pass through and appear lighter. This density variation produces gradations of light and shadow that form Jackson's facial features, hair, and collar. On a genuine note, you'll see fine detail in the portrait—individual strands of hair, the contours of Jackson's face, and the folds of his clothing all emerge as distinct elements when the bill is held against a lamp or window.
How to Examine the Watermark Properly
Position the note between your eyes and a bright light source such as a desk lamp, overhead fixture, or sunlit window. Hold the bill flat rather than crumpled, and adjust the angle slightly if needed to maximise the contrast between light and dark areas. The watermark should become immediately visible without requiring magnification, though the detail becomes clearer the brighter your light source. Examine the watermark from both the front and back of the note—it should appear equally clear from either side2, confirming that it exists within the paper structure rather than being printed on one surface.
Pay attention to the clarity and definition of the portrait. Genuine watermarks display smooth transitions between light and dark areas, creating a lifelike representation of Jackson's features. The outline of the head should be distinct, and you should be able to make out facial details such as the eyes, nose, and mouth. If the watermark appears blurred, pixelated, or shows harsh transitions between light and dark rather than gradual shading, you're likely examining a counterfeit attempt.
Common Counterfeit Failures
Many counterfeit $20 bills lack a watermark entirely—when held to light, these fakes show only the printed elements visible under normal lighting, with no embedded portrait appearing in the blank space. This absence immediately identifies the note as fraudulent. More sophisticated counterfeits may attempt to simulate a watermark through printing techniques, but these imitations fail under close examination. Printed watermarks typically appear only on one side of the note rather than being visible from both sides, and they often show as a grey or faded printed image rather than the three-dimensional depth created by paper density variations.
Some counterfeiters use bleached lower-denomination bills and reprint them as $20 notes, which means the paper itself is genuine but the watermark shows the wrong president. If you see a watermark of Abraham Lincoln (from a $5 bill) or George Washington (from a $1 bill) on what's supposed to be a $20 note, you've identified a "bleached bill" counterfeit. Always verify that the watermark portrait matches the denomination you're examining—Andrew Jackson for $20 bills.
The watermark check takes only seconds to perform and requires nothing more than a light source you likely already have nearby. When combined with checks of the security thread, colour-shifting ink, and paper texture, the watermark provides a reliable layer of verification that helps you confidently distinguish genuine $20 bills from counterfeits. For a systematic approach to verifying multiple security features together, see How to Spot Counterfeit $20 Dollar Bills: A Step-by-Step Guide.
The Color-Shifting Ink Feature
Genuine $20 bills incorporate color-shifting ink as a dynamic security feature that changes appearance when you tilt the note. This optical effect relies on specialised ink technology that counterfeiters find difficult to reproduce accurately, making it one of the most reliable quick-check methods for verifying authenticity.
How the Color Shift Works
Look at the numeral 20 printed in the lower right corner on the front of the note. When you hold the bill flat and view it straight on, this numeral appears copper in colour. Now tilt the note slowly—angle it away from you or side to side whilst keeping your eyes on that corner numeral. As you change the viewing angle, the numeral 20 shifts from copper to green2. This transition happens smoothly as you tilt, creating a noticeable colour change that you can repeat as many times as you like by adjusting the angle back and forth.
The colour shift results from optically variable ink (OVI), a sophisticated material that reflects different wavelengths of light depending on the angle of view. When light strikes the ink at one angle, the copper wavelengths dominate; at another angle, green wavelengths become more prominent. This effect occurs because the ink contains microscopic flakes or layers that interfere with light waves, producing the shifting appearance. The technology requires specialised manufacturing equipment and materials that remain largely inaccessible to counterfeiters, particularly those operating outside official minting facilities.
What to Look For During Inspection
Hold the $20 bill under good lighting—natural daylight or bright indoor illumination works best. Position the note so you can clearly see the numeral 20 in the lower right corner of the front side. Tilt the bill slowly through a range of angles, watching the numeral as you move. The colour shift should be distinct and repeatable. You're looking for a clear transition between copper and green, not a subtle hint of colour change or a shift to an unrelated colour such as blue, purple, or bronze.
The shift should affect only the corner numeral, not the surrounding printed elements. Other ink on the note—the portrait of Andrew Jackson, the border designs, the serial numbers—remains the same colour regardless of viewing angle. If you notice colour changes in areas other than the designated numeral 20, or if the entire note seems to shift colour when tilted, you're likely examining a counterfeit or encountering an optical illusion from ambient lighting rather than genuine color-shifting ink.
Common Counterfeit Failures
Many counterfeit $20 bills fail the color-shifting ink test entirely. The numeral 20 in the lower right corner remains a single static colour—often printed in standard green ink—that doesn't change no matter how you tilt the note. This absence of colour shift immediately identifies the bill as fraudulent. Some more sophisticated counterfeits attempt to simulate the effect by printing the numeral in a colour that appears greenish-copper under certain lighting, but these imitations lack the dynamic shift that occurs with genuine optically variable ink. When you tilt these fakes, the colour might appear slightly different due to lighting conditions or reflections, but you won't see the distinct copper-to-green transition that characterises authentic notes.
Other counterfeits use holographic stickers or foil overlays in an attempt to create a shifting effect, but these additions sit on top of the paper surface rather than being printed into it. Genuine color-shifting ink integrates with the note's printing, forming a smooth surface that you can feel as part of the overall raised texture. Holographic overlays or stickers create a distinct tactile difference—a separate layer that you can detect by touch.
Combining This Check With Other Features
The color-shifting ink test works best when performed alongside other verification methods. After checking the colour shift, examine the watermark by holding the bill to light, inspect the security thread for visibility and UV fluorescence, and feel the paper texture to confirm the cotton-linen blend and raised printing. Each security feature addresses different counterfeiting techniques, so verifying multiple elements gives you greater confidence in your assessment.
The color-shifting ink check takes only seconds and requires no equipment—just adequate lighting and the ability to tilt the note through different angles. This accessibility makes it particularly useful for quick verification in everyday transactions, whether you're a cashier handling multiple bills during a busy shift or an individual accepting payment in a private sale. When the numeral 20 shifts cleanly from copper to green as you tilt the bill, you've confirmed one of the most difficult security features for counterfeiters to replicate, providing strong evidence that the note in your hand is genuine.
Common Mistakes and Misconceptions
When verifying the authenticity of a $20 bill, it's essential to be aware of common pitfalls that can lead to incorrect conclusions. Here are some typical errors and misconceptions to watch out for:
Relying Solely on Visual Inspection
Many people assume that a quick glance at the bill is enough to determine its authenticity. However, counterfeiters have become increasingly sophisticated in replicating visual elements. To avoid being fooled, it's crucial to check multiple security features, including the feel of the paper, the security thread, and the watermark12.
Ignoring the Security Thread
Some individuals overlook the security thread embedded in the paper, which glows green under UV light. Failing to check this feature can lead to accepting a counterfeit bill. Always verify that the security thread is visible from both sides of the note and glows green when illuminated by ultraviolet light2.
Misunderstanding the Watermark
A common misconception is that the watermark is printed on the bill. In reality, it's a genuine feature created by variations in paper density. Be aware that some counterfeits may attempt to simulate a watermark through printing, but these imitations typically appear only on one side of the note2.
Not Checking for Raised Printing
Genuine $20 bills have raised printing that gives them a distinctive texture. Counterfeiters often struggle to replicate this feature convincingly. When examining a bill, run your fingers over the surface to feel for raised printing, particularly around the portrait of Andrew Jackson2.
Assuming All Older Bills Are Counterfeit
Some people mistakenly believe that older $20 bills are automatically counterfeit. However, all U.S. currency remains legal tender, regardless of when it was issued. Be aware that older bills may lack some of the advanced security features found on newer notes, but they are still genuine3.
Failing to Report Suspected Counterfeits
If you suspect a $20 bill is counterfeit, it's essential to report it to the authorities. Failing to do so can lead to further circulation of the fake bill and potentially support counterfeiting operations. Know how to report suspected counterfeits to the relevant authorities, such as the Secret Service.
Key Takeaways
To ensure you're handling genuine $20 bills, remember these essential verification steps:
- Check the paper texture for the distinctive feel of 75% cotton and 25% linen blend with raised printing.
- Verify the security thread is visible from both sides and glows green under UV light.
- Hold the bill to light to see Andrew Jackson's watermark visible from both sides.
- Tilt the bill to observe the numeral 20 shifting from copper to green.
- Inspect for microprinted text 'USA20' along the border of the TWENTY USA ribbon.
For a systematic approach to verifying multiple security features together, see our guide on How to Spot Counterfeit $20 Dollar Bills: A Step-by-Step Guide.