error notes – Page 2

Grading Error Notes: How Printing Mistakes Interact with Condition Standards at PMG and PCGS

June 15, 2026 by

Error notes occupy a fascinating and sometimes confusing corner of currency collecting, where the rules of standard grading meet an entirely different set of valuation criteria. This guide breaks down exactly how PMG and PCGS Currency evaluate printing mistakes, what qualifies as a gradeable error versus a damaged note, and which specific error types command the highest premiums in today’s market.

Stuck Digit Errors: When the Numbering Wheel Fails and Creates Repeated Digits in US Currency

June 15, 2026 by

Stuck digit errors occur when a wheel in the serial number printing mechanism fails to advance, stamping the same digit repeatedly across a note’s serial number. These mechanical failures produce some of the most visually dramatic and collectible error notes in modern US currency.

Federal Reserve Note District Mismatch Errors: When the Wrong Seal Meets the Wrong Serial Number Prefix

June 15, 2026 by

District mismatch errors on Federal Reserve Notes occur when a note is printed with a Federal Reserve district seal that does not correspond to its serial number prefix letter, creating one of the most visually dramatic and numismatically significant error types in modern US currency. This guide covers how these errors happen, how to authenticate them, and what collectors should know before buying or selling.

Third Printing Errors: Misaligned Serial Numbers and Seals on Modern Federal Reserve Notes

June 15, 2026 by

When the Bureau of Engraving and Printing’s third printing stage goes wrong, the result is some of the most visually dramatic and collectible error currency in modern numismatics. This guide breaks down exactly how misaligned serial number and seal errors occur, which specific series to hunt for, and what these striking mistakes are worth in today’s market.

Missing Overprint Errors: Notes That Left the BEP Without Serial Numbers or Seals

June 15, 2026 by

Among the most dramatic and visually striking error notes in American currency collecting, missing overprint errors represent a complete failure of one of the Bureau of Engraving and Printing’s final production steps. Whether a note escaped without serial numbers, Treasury seals, or both, these pieces command serious collector attention and can fetch thousands of dollars at auction.

Mismatched Serial Number Errors: When the Left and Right Numbers Don’t Match and Why It’s Rarer Than You Think

June 15, 2026 by

A mismatched serial number error is one of the most visually dramatic and technically fascinating mistakes in US currency production, yet most collectors have never seen one in person. This guide breaks down exactly how these errors occur, what makes them so elusive, and what to look for when evaluating one for your collection.

Double Serial Number Errors on Small-Size Notes: When Both Numbers Print Twice and the Auction Results That Prove Their Value

June 15, 2026 by

Double serial number errors rank among the most visually dramatic and genuinely rare mistakes to escape a Federal Reserve printing facility, occurring when the serial number is printed twice on the same face of a note. Understanding how these errors happen, how to authenticate them, and what they fetch at auction can mean the difference between a shrewd buy and a costly mistake.

Defective Seal Errors on Modern Federal Reserve Notes: Partial, Faded, and Malformed Treasury Seals That Escaped the BEP

June 15, 2026 by

Treasury seal errors rank among the most visually dramatic and collectible mistakes to escape the Bureau of Engraving and Printing, yet many collectors don’t know how to identify genuine defects from normal printing variation. This guide breaks down every major category of seal error on modern Federal Reserve Notes, with specific examples, auction values, and the grading nuances that separate a $50 curiosity from a $5,000 centerpiece.

Printed Fold Errors on Federal Reserve Notes: When the Paper Folds During Printing and the Ink Covers the Crease

June 15, 2026 by

Printed fold errors rank among the most visually dramatic and mechanically fascinating mistakes the Bureau of Engraving and Printing has ever released into circulation. This guide breaks down exactly how these errors occur, what varieties collectors should know, and what genuine specimens are worth in today’s market.

Inverted Third Printing Errors on Series 1974 and 1977 Federal Reserve Notes: Upside-Down Seals and Serial Numbers by District

June 15, 2026 by

Inverted third printing errors, where Federal Reserve seals and serial numbers appear completely upside down, rank among the most visually dramatic mistakes ever to escape the Bureau of Engraving and Printing. This deep-dive covers every confirmed district, print run estimate, and current market value for Series 1974 and 1977 survivors.