Planet Banknote · Reference Library

Every banknote tells a story.

A free collector’s library on world paper money, written and fact-checked by Planet Banknote: hyperinflation history, grading, authentication, and guides to the notes of 49+ countries. Learn to read the stories, then hold them.

Start collecting 100 Trillion Price Index

89 reference guides49 country guides6 hyperinflations documentedUpdated July 2026

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Four guides that answer the questions almost every new collector asks first.

Start hereHow to Start CollectingChoose a focus, set a budget, and buy your first notes safely.GradingThe PMG & PCGS 1-70 ScaleWhat UNC, EPQ, and the numbers on a slab actually mean.The flagship100 Trillion: Value by GradeReal dealer prices from raw UNC to PMG 68 EPQ.AuthenticationSpot a CounterfeitSecurity threads, color-shift ink, and the checks that matter.

The flagship note

The note that made hyperinflation collecting famous.

Zimbabwe · Pick P-91

The 100 Trillion Dollar Note

Dated 2008, released January 2009, withdrawn three months later: the highest-denomination banknote of the modern era, with fourteen zeros. We publish the only grade-by-grade price index for it, updated monthly from our own retail data.

Price Index Real vs Fake Shop the note

100,000,000,000,000Fourteen zeros · Pick P-91

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Every guide, one click away. Written answer-first, updated on a schedule, and free to cite.

Every banknote tells a story.

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The flagship note

The 100 Trillion Dollar Note

Browse the whole library

Zimbabwe 100 Trillion7

Hyperinflation8

Famous Notes8

Grading & Comparison3

Collecting Guides4

By Country49

Terms & Reference6

Guides & Info4