The three fastest checks: tilt the note and watch the gold Zimbabwe Bird in the lower right shift color, shine a UV blacklight on it and look for a bright glow, and run a fingertip over the serial numbers to feel raised ink. And if your note is shiny gold foil or plastic, it is a novelty replica, not real currency.
This guide covers every documented security feature of the genuine 2008 Zimbabwe 100 trillion dollar note (Pick P-91), the fakes and replicas you are most likely to meet, and a step-by-step check sequence you can run at home in about five minutes. The 100 trillion is the highest-denomination banknote of the modern era, with fourteen zeros, dated 2008, released in January 2009 and withdrawn in April 2009 when Zimbabwe abandoned its dollar. Because it is famous and valuable, it is also the most copied note in the hobby.
What security features does a genuine 100 trillion note have?
The Reserve Bank of Zimbabwe printed the trillion series under sanctions, so the note carries fewer high-tech features than a modern US bill. That actually makes authentication easier: there are a handful of specific, checkable features, and fakes almost never get all of them right.
1. The color-shifting Zimbabwe Bird (optically variable ink)
The single most reliable check. The front of the note carries a silhouette of the Zimbabwe Bird printed in optically variable ink, documented in Wikipedia's entry on the note. Hold the note flat, then tilt it toward and away from a light source. The bird in the lower right of the front should shift between gold and bronze tones as the angle changes. On foil replicas and paper reprints the bird is flat, printed in one static color, and does not move at all.
2. The gold "RBZ" security stripe
Down the left side of the front runs a patterned golden stripe carrying the letters RBZ (Reserve Bank of Zimbabwe). Wikipedia describes this patterned stripe as one of the note's two main security elements, and collector authentication guides such as Onehundredtrillion.com describe the repeating gold RBZ lettering. Check that the stripe has metallic sheen and crisp, readable letters. Reprints usually render it as a dull yellow band with mushy lettering.
3. UV-reactive inks
Genuine trillion-series notes respond strongly under a UV blacklight in a dark room. According to the authentication guide published by Onehundredtrillion.com, the body of a genuine note fluoresces blue, the peach center panel turns yellow, and the red and black serial numbers shift to orange and green. Lapo Numismatics likewise documents fluorescent RBZ initials and patterns that glow under UV. Gold foil replicas show nothing under UV, and most paper reprints either stay dark or glow bright paper-white because they are printed on brightened office paper rather than banknote paper.
4. Raised intaglio printing
Real notes are printed with intaglio (engraved) plates in key areas, which leaves ink you can feel. Run a fingertip or thumbnail across the serial numbers: on a genuine note the ink is slightly raised, a detail documented by both Onehundredtrillion.com and Lapo Numismatics. Lapo's guide also notes raised texture on the denomination and Reserve Bank elements. Inkjet and laser reprints are perfectly flat.
5. Serial numbers and the AA prefix
Each genuine note carries serial numbers printed in matching red and black, in a consistent font with even alignment. The prefix is two letters followed by digits. The AA prefix is by far the most common on P-91 notes, with AB and AC prefixes documented in smaller quantities (per dealer listings at Banknote World and Planet Banknote's own inventory). Mismatched fonts, crooked digits, or identical serial numbers across several "different" notes are classic reprint tells.
6. Paper, size, and print sharpness
Genuine notes are printed on cotton-based banknote paper with a slightly coarse, firm feel, per Lapo Numismatics. Wikipedia lists the note at roughly 148 by 74 millimeters, though published measurements vary slightly between sources, so treat size as a supporting check rather than a deciding one. Under a loupe, genuine fine-line patterns and border details stay crisp; reprints dissolve into dots or blur.
Does the 100 trillion note have a watermark?
Honest answer: sources disagree, so do not rely on a watermark test. Wikipedia states the note "lacked modern security features, such as a watermark" because of sanctions against Zimbabwe at the time, while some dealer guides describe a watermark in the unprinted area. Onehundredtrillion.com says a denomination becomes visible when the note is held up to light. Because published sources conflict, treat anything you see (or do not see) against the light as inconclusive on its own. The tilt test, the UV test, and the raised-ink test are the checks that settle it.
What do fake 100 trillion notes look like?
Gold foil "100 trillion" replicas: the number one source of confusion
The most common fake is not really a counterfeit at all. Shiny gold, silver, or blue metallic-foil "100 trillion dollar" notes are sold openly on Amazon, eBay, and Etsy, and the listings themselves describe them as "novelty replica currency" made of foil or plastic. They were never printed by the Reserve Bank of Zimbabwe. Many even ship with their own printed "certificate of authenticity," which certifies only that you bought a souvenir. Some invent denominations that never existed, such as "yottalillion" notes seen in eBay listings. If a note is metallic, plastic-feeling, or gold all over, it is a novelty item worth a few dollars at most, no matter what the listing claimed.
Paper reprints and copies
Modern paper reprints are the more dangerous fake because they look right in an online photo. In hand they give themselves away: flat single-color Zimbabwe Bird with no shift when tilted, no glow or a wrong bright-white glow under UV, smooth flat serial numbers you cannot feel, glossy or flimsy paper, and fine-line patterns that blur under magnification. Lapo Numismatics also flags price as a signal: genuine notes selling far below the established market level are usually not genuine.
Quick comparison
| Check | Genuine P-91 | Gold foil replica | Paper reprint |
|---|---|---|---|
| Material | Cotton banknote paper, firm feel | Metallic foil or plastic | Office or glossy paper |
| Zimbabwe Bird tilt test | Shifts gold to bronze | Static, part of the foil print | Static, flat ink |
| UV blacklight | Fluorescent glow (blue body, yellow center, per Onehundredtrillion.com) | No reaction | Dark, or bright paper-white |
| Serial numbers | Raised ink, red and black, AA most common | Often identical on every piece | Flat ink, font often off |
| Fine detail under loupe | Crisp lines and patterns | Coarse foil stamping | Blurry or dotted |
| Honest value | Collectible, three figures raw | A few dollars, novelty | None |
How do graded holders help you verify authenticity?
The strongest form of authentication is third-party grading. PMG (Paper Money Guaranty) and PCGS Banknote both authenticate every note before assigning a grade on the 1 to 70 scale, then seal it in a tamper-evident holder with a unique certification number. You can verify that number yourself in seconds, for free:
- PMG: enter the cert number at pmgnotes.com/certlookup and confirm the description and grade match the holder in front of you.
- PCGS: enter the cert number at pcgs.com/cert and do the same.
If the lookup result does not match the label, or the number does not exist, walk away. A graded 100 trillion also removes the guesswork premium: as Planet Banknote current retail (July 2026, prices change), a raw UNC AA note is $198.17 while a PMG 66 Gem UNC EPQ example is $229, so certified authentication costs surprisingly little over raw. See our 100 trillion value guide for the full grade-by-grade breakdown.
How does Planet Banknote authenticate its notes?
Every 100 trillion note we sell passes through the Planet Banknote Verified process before it is listed: material and print inspection, the tilt, UV, and raised-ink checks described above, and serial verification. Because we source direct from mints, central banks, authorized distributors, and trusted consignors rather than buying from random private sellers, replica notes never enter our pipeline in the first place. Each order ships with a free Certificate of Authenticity that records your note, and our Lifetime Guarantee covers authenticity for as long as you own it.
Planet Banknote is a family-owned dealership in Sarasota, Florida, founded in 2021. Every note is sourced direct from mints, central banks, and authorized distributors, inspected through our Planet Banknote Verified process, and ships with a free Certificate of Authenticity. US orders ship free via USPS Priority, and every order includes a free bonus gift.
Browse our Zimbabwe banknote collection or go straight to the original UNC AA 100 trillion note.
How to authenticate a 100 trillion note in 5 minutes: step by step
- Check the material. Genuine notes are cotton banknote paper with a firm, slightly coarse feel. Anything metallic, foil, or plastic is a novelty replica. Stop here if it is foil.
- Run the tilt test. Tilt the note under a light and watch the Zimbabwe Bird in the lower right of the front. It must shift between gold and bronze tones. No shift means no sale.
- Inspect the gold RBZ stripe. Confirm the left-edge stripe has metallic sheen and crisp repeating RBZ lettering.
- Feel the serial numbers. The ink should be slightly raised under a fingertip. Flat serials point to a reprint.
- Read the serials. Expect red and black serial numbers in a consistent font, evenly aligned, with a two-letter prefix. AA is the most common on P-91.
- Shine a UV blacklight. In a dark room a genuine note fluoresces; a fake stays dark or glows flat white.
- Loupe the fine detail. Border patterns and small text should stay crisp at 10x. Blur means print, not plate.
- Verify the holder if graded. Look up the cert number at pmgnotes.com/certlookup or pcgs.com/cert and match it to the label.
Frequently asked questions
Are gold foil 100 trillion dollar notes worth anything?
Only as souvenirs. Gold, silver, and colored foil "100 trillion" notes are sold on Amazon, eBay, and Etsy as novelty replicas, they were never issued by the Reserve Bank of Zimbabwe, and they typically retail for a few dollars. The certificates packed with them certify the souvenir, not a banknote.
My note has no visible watermark. Does that mean it is fake?
No. Published sources conflict on whether the 2008 trillion series carries a watermark at all, and Wikipedia states the note lacked one because of sanctions. Judge the note on the color-shifting Zimbabwe Bird, the UV reaction, the raised serial ink, and the gold RBZ stripe instead.
What serial number prefix should a real 100 trillion note have?
Most genuine P-91 notes carry the AA prefix. AB and AC prefixes are documented in smaller quantities in dealer listings. Any prefix is only meaningful alongside the physical checks, since reprints copy real serials.
Can PMG or PCGS detect a fake 100 trillion note?
Yes. Both services authenticate every note before grading and will not holder a counterfeit or replica. That is why a sealed PMG or PCGS holder with a verifiable cert number (pmgnotes.com/certlookup or pcgs.com/cert) is the safest way to buy.
What is a genuine 100 trillion note worth?
As Planet Banknote current retail in July 2026 (prices change with the market): $198.17 for a raw UNC AA example, $229 for PMG 66 Gem UNC EPQ, $279 for PMG 67 Superb Gem UNC EPQ, and $329 for PCGS 68 Superb Gem UNC PPQ. Our value guide explains what drives each tier.
Last updated: July 2026