What is my banknote worth?
Serial number, signature variety, and condition all drive banknote prices. Here's how to read them before you buy or sell.
Why two notes of the same denomination can differ by thousands
World banknote collecting — called notaphily — covers an enormous range of values for seemingly identical pieces. A 1918 Federal Reserve Bank Note in Fine condition might trade for a few hundred dollars, while a superb uncirculated example with the right serial number block and a solid PMG grade could reach the thousands. Three variables account for nearly every price spread. The first is the specific printing variety: central banks issue notes in series, and within each series there are signature combinations, plate letters, and printing codes that define distinct varieties with different rarity levels. The second is the serial number itself — solid numbers (111111), radars (palindromes like 12344321), or low serials (A00000001) attract specialist collectors and can add substantial premiums. The third, as with coins, is condition: a crisp, original paper note commands dramatically more than a heavily circulated example that has been folded, washed, or repaired.
Understanding signature varieties and printing series
Most countries' central banks place the signatures of the Governor and Treasurer (or equivalent officials) on their banknotes. When these officials change, a new signature combination is introduced without necessarily changing the overall note design. Collectors track these combinations carefully because some were produced for only a short time before the officials changed again, resulting in scarce varieties hidden within a common-looking note. The same note with an earlier signature combination might be worth ten times a later one from the same series. Printing dates, series letters, and prefix codes further subdivide a type. For US notes, the Federal Reserve Bank designation, the plate letter, and the series year together define the full variety. NoteLens reads these details from the note's face and reverse to identify the specific variety and pull the appropriate market reference range.
Paper condition and the grading scale for banknotes
Paper notes are far more fragile than coins, and condition differences are even more pronounced in their effect on value. The PMG (Paper Money Guaranty) and PCGS Currency scales run from 1 (Poor) to 70 (Gem Uncirculated), mirroring coin grading numerically but with paper-specific descriptors. A note graded PMG 64 (Choice Uncirculated) has no folds but may have a single counting crease or minor corner bend; a PMG 66 EPQ (Exceptional Paper Quality) note has bold colour, no folds, and an undisturbed paper surface that suggests it was stored flat from the day of issue. The EPQ and PPQ designators indicate that the note has not been pressed, cleaned, or artificially brightened — the paper equivalent of a coin's original surface. Even a single vertical fold through the centre of a note drops it from the Uncirculated tier to Very Fine territory at best, representing a significant loss in value for any scarce series.
FAQ
How does NoteLens identify a banknote?
NoteLens uses your iPhone camera to read the note's denomination, issuing country, series year, prefix codes, and signature block. These details are matched against a catalogue of world banknotes to identify the specific variety. The app returns the most likely match with a confidence indicator. For older or heavily worn notes where text is difficult to read, you can refine the match manually by selecting country, denomination, and series.
Does a fancy serial number always increase value?
Fancy serial numbers — solid digits, radars, ladders, low serials under 100, and similar patterns — attract a premium among note collectors who specialise in them. However, the premium varies enormously depending on the base note's rarity and condition. A fancy serial on a very common modern note in circulated condition adds modest value; the same serial type on a scarce series note in high grade can multiply the value several times. Condition still matters more than the serial for most notes.
What is the best way to store banknotes long-term?
Store banknotes flat in archival-quality Mylar sleeves or Currency Slab holders. Avoid PVC pages, rubber bands, and paper envelopes with printed inks. Keep them away from direct light, which bleaches colour over time, and maintain stable humidity — ideally 45 to 55 percent relative humidity. Never fold a note you consider collectible, and handle only by the edges. High-value notes benefit from individual hard plastic currency holders that prevent bending during storage.