What Is an Errata Slip in a Book?

An errata slip (plural: errata) is a small printed notice listing corrections to errors found in a book after it has been printed. The slip is inserted into the book — typically tipped onto the copyright page, title page, or front free endpaper, or simply laid in loose — as an acknowledgement that the text contains mistakes that could not be corrected before binding.

The word “errata” is Latin for “errors.” A single correction is technically an “erratum”; multiple corrections are “errata.” In practice, any correction slip is called an errata slip regardless of how many errors it lists.

Why Errata Slips Exist

Publishing a book involves multiple stages of proofreading and correction, but errors sometimes survive to the final printed text. When mistakes are discovered after printing but before (or during) binding, the publisher faces a choice:

• Reprint the affected pages — expensive and time-consuming
• Cancel the leaf — replace the affected page with a corrected version (a “cancel”)
• Issue an errata slip — the cheapest and fastest option
• Ignore it — and fix it in the second printing

For minor errors (misspellings, wrong dates, incorrect cross-references), an errata slip is the standard remedy. For significant errors that affect meaning, a cancel may be warranted.

Types of Errata

Tipped-in errata. A small slip of paper (sometimes just 2” × 4”) glued by one edge to a page, usually near the front of the book. This is the most common format.

Loose errata. A slip placed loosely between pages, not attached. These are frequently lost because they fall out during use. Loose errata are the most likely component to be missing from a book.

Errata page. Some books include a full page of errata printed as part of the text, though this is more common in academic and technical publishing.

Corrigenda. Technically, “errata” refers to errors by the author, while “corrigenda” refers to errors introduced by the printer or typesetter. In practice, the distinction is rarely observed.

Collecting Significance

Errata slips matter to collectors for several reasons:

Completeness. An errata slip issued with the book is part of the book as published. Its presence (or absence) affects completeness. A book described as complete should include the errata slip if one was issued.

First printing evidence. Errata slips are typically found only in first printings. By the second printing, the errors have been corrected in the text and the slip is no longer needed. The presence of an errata slip therefore often confirms first printing status.

Issue points. In bibliographic terms, the presence or absence of an errata slip can define different “issues” or “states” of a first printing. Copies with the errata slip (issued later in the print run, after the errors were noticed) may represent a different state than copies without it.

Scarcity. Because loose errata slips are easily lost, copies retaining their errata may be scarcer than copies without. Paradoxically, the error-acknowledging slip can increase a book’s value by demonstrating completeness.

Errata and Value

The effect on value depends on context:

• A book with its errata slip is more valuable than the same book without it, because it is more complete
• The errata slip alone confirms the book’s integrity as a first-printing copy
• A book without errata when one was issued is subtly incomplete, which an experienced bookseller would note

The value premium is modest in most cases — the errata slip is a minor component. But for bibliographically significant books, or books where the errata slip is a recognized issue point, its presence can matter considerably.

Bookseller Descriptions

Standard descriptions include:

• “With errata slip tipped to copyright page” — present and attached
• “With errata slip laid in” — present but loose
• “Errata slip lacking” — absent; noted as a deficiency
• “Without the rarely found errata slip” — absent, with acknowledgement of scarcity

When buying a first edition where an errata slip is known to exist, ask the seller whether the slip is present. Not all booksellers note its absence.

Famous Errata in Book Collecting

Several well-known first editions have errata slips that are significant collecting points:

F. Scott Fitzgerald, The Great Gatsby (1925). The first printing contains several textual errors, including “sick in tired” for “sick and tired” on page 205. These errors were corrected in later printings and serve as identification points for the first printing — they function like built-in errata, even though Scribner’s did not issue an errata slip.

J.K. Rowling, Harry Potter and the Philosopher’s Stone (1997). The first printing contains the famous “1 wand” duplication on page 53 of the equipment list. This error functions as a first-printing point and was corrected in subsequent printings.

James Joyce, Ulysses (1922). Shakespeare and Company’s first edition contains numerous typographical errors — inevitable given the complexity of the text and the Parisian printing conditions. An errata list was issued with some copies. The presence of this errata list is a recognized collecting point.

These examples illustrate a broader principle: errors in first editions often become assets rather than liabilities. An uncorrected error is evidence of first-printing status, and collectors prize the evidence of the book’s earliest state — imperfections included.

The Psychology of Errata

There is something appealing to collectors about errata slips as artifacts. They represent the moment a publisher recognized a flaw and attempted to correct it — a small drama of quality control played out in a slip of paper tucked into the binding. An errata slip is evidence that someone cared enough about accuracy to acknowledge the mistake, and that the publisher spent money to print and insert corrections rather than simply ignoring the problem.

For modern books, where digital typesetting has reduced (but not eliminated) printing errors, errata slips have become increasingly rare. When they do appear, they tend to note more significant errors — factual mistakes in non-fiction, mislabeled photographs, or legal corrections — rather than the minor typographical issues that once filled errata lists.

If you acquire a book that contains an errata slip, keep the slip in place. Do not remove it, discard it, or store it separately. The slip is part of the book’s original issue and contributes to its completeness and collector value.