missing print errors

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.

Obstruction Errors: When Foreign Objects Cause Missing Print Areas and What These Notes Sell For

June 15, 2026 by

Obstruction errors rank among the most visually dramatic mistakes to ever leave a Bureau of Engraving and Printing press, created when debris, tape, or folded paper blocks ink from reaching the substrate. Understanding what causes these striking anomalies, how to authenticate them, and what the market actually pays separates savvy collectors from those who overpay or miss a bargain.