error notes – Page 3

Missing District Letter Errors on Series 1988 Federal Reserve Notes: Notes That Escaped the BEP Without a Federal Reserve Bank Prefix

June 15, 2026 by

Among the rarest and most dramatic printing errors in modern Federal Reserve Note production, missing district letter errors on Series 1988 notes represent a genuine failure of quality control at the Bureau of Engraving and Printing. This guide explores what caused these errors, how to identify authentic examples, and what collectors should know before spending serious money on one.

Missing Face or Back Printing Errors: Blank Sided Notes and Their Extreme Rarity

June 15, 2026 by

Among the rarest and most dramatic error notes ever produced by the Bureau of Engraving and Printing, blank-sided currency represents a catastrophic failure in the multi-stage printing process. This guide breaks down exactly how these errors happen, which series and denominations command the highest prices, and what collectors need to know before buying or selling one.

Double Denomination Errors on Small-Size Notes: When a $10 Face Meets a $20 Back at the Cutting Table

June 15, 2026 by

Double denomination errors rank among the most visually dramatic and collectible mistakes in all of paper money, produced when mismatched printed sheets are stacked and cut together at the Bureau of Engraving and Printing. This guide breaks down exactly how these errors happen, which known examples exist, and what you should expect to pay or verify before buying one.

Inverted Back Errors on National Bank Notes: The Mechanics of Large-Size Sheet Printing That Made Them Possible

June 15, 2026 by

Inverted back errors on large-size National Bank Notes rank among the most dramatic and mechanically fascinating mistakes in American currency history. This deep-dive explores exactly how two-pass intaglio printing created the conditions for these spectacular errors, which specific notes are known, and what collectors should understand before pursuing one.

Ink Void Errors on Modern Federal Reserve Notes: Causes, Appearance, and Auction Results

June 15, 2026 by

Ink void errors rank among the most visually dramatic mistakes to survive the Bureau of Engraving and Printing’s quality control process, leaving collectors with notes that are simultaneously incomplete and remarkable. This guide breaks down exactly how these errors form, how to distinguish genuine voids from post-printing damage, and what recent auction results tell us about their true market value.

The BEP’s Intaglio Printing Process: Why US Currency Feels Different from Regular Paper

June 15, 2026 by

The distinctive raised-ink texture of a United States banknote is no accident: it is the direct result of a 150-year-old intaglio printing tradition maintained by the Bureau of Engraving and Printing. Understanding exactly how this process works, why it matters for authentication, and how it affects the collectibility and grading of your notes will transform the way you handle every bill in your collection.

Inking Roller Skip Errors on Intaglio Currency: The Diagonal Bands of Missing Ink That Fascinate Collectors

June 15, 2026 by

Inking roller skip errors produce dramatic diagonal bands of missing ink across portraits and back designs on intaglio-printed currency, creating some of the most visually striking error notes in American numismatics. This guide explains exactly how these errors occur, how to authenticate them, and which examples command serious collector premiums.

Board Breaks: Plate Cracks and Void Lines That Create Dramatic Printing Artifacts on U.S. Currency

June 15, 2026 by

Plate cracks, board breaks, and void lines are among the most visually striking printing errors in U.S. paper money collecting, yet they remain poorly understood by most collectors. This deep-dive explains exactly how these artifacts form, which notes to target, and how to evaluate their significance and value.

Missing Second Printing Errors on Federal Reserve Notes: Collecting Notes Without Seals, Signatures, or Serial Numbers

June 15, 2026 by

When the Bureau of Engraving and Printing’s second printing pass fails entirely or partially, the result is some of the most dramatic and collectible error notes in U.S. currency. This guide covers everything from how these errors occur to which specific series command top dollar at auction.

Doubled Serial Number Digit Errors: When a Single Numbering Wheel Strikes Twice on the Same Position and What These Sell For

June 15, 2026 by

Doubled serial number digit errors rank among the most visually dramatic and mechanically fascinating misprints in U.S. paper money collecting, yet they remain widely misunderstood even by experienced hobbyists. This guide breaks down exactly how these errors occur, how to authenticate them, and what the current market looks like from common examples to genuine showstoppers.