A Small Post-Publication Change Can Carry a Large Scholarly Responsibility
The difference between errata and addenda and how to handle them becomes important the moment an author discovers that a published article, thesis-derived paper, book chapter, conference proceeding, or professional report is incomplete or contains an error. The first reaction may be to send a replacement sentence, upload a revised file, or ask the publisher to “update the paper.” Yet a published work is part of the scholarly record. Changes need to be transparent, proportionate, linked to the original work, and handled under the publisher’s own policy.
An erratum is primarily corrective. It identifies something that was wrong in the published version and supplies the accurate information. An addendum is primarily supplementary. It gives readers important information that was not in the original work but is useful for understanding, interpreting, reproducing, or properly crediting it. This distinction sounds simple, but real cases are often more complicated. Publishers may use correction, corrigendum, or publisher correction instead of erratum. A journal may decline a formal notice for a harmless typo but require a correction for a wrong unit, author detail, figure label, statistical value, or disclosure. New evidence may call for a new article rather than an addendum.
For PhD scholars and early-career researchers, the process can feel uncomfortable because reporting an error may seem risky. In responsible scholarship, however, prompt correction is a sign of professional integrity. The key is to assess the impact honestly. Does the issue change a number, sentence, method, figure, attribution, interpretation, or conclusion? Can readers still rely on the main results? Was the problem introduced by the author, by production, or by a later development? The answer helps the editor choose the correct mechanism.
This guide explains erratum versus addendum in practical terms, shows how corrigenda and retractions fit into the decision, provides a step-by-step correction workflow, and offers examples for journal articles, theses, books, and research reports. It also explains how ethical academic editing support can help an author prepare a clean correction log, accurate replacement text, and a professional request without obscuring responsibility or promising a particular editorial outcome.
Quick Answer: What Is the Difference Between Errata and Addenda?
An erratum corrects a mistake in a published work. An addendum adds important information that supplements the work. Use an erratum or publisher-designated correction when the existing record contains a factual, numerical, textual, figure, metadata, or production error that readers need to see corrected. Use an addendum when the original work remains valid but a later clarification, acknowledgement, data note, disclosure, or other material information should be formally linked to it.
Do not select the label only by personal preference. Journal conventions differ, and the editor or publisher decides whether the notice will be called an erratum, corrigendum, correction, addendum, expression of concern, or retraction. Your role is to report the issue promptly, describe the impact accurately, and provide exact corrected or added content.
Key Takeaways
- Errata correct what is wrong; addenda supplement what is missing or newly relevant.
- Many publishers reserve erratum for publisher errors and corrigendum for author errors.
- A correction is appropriate only when the original findings remain substantially reliable.
- New results usually belong in a separate paper, not an addendum.
- Every request should identify the DOI, exact location, current text, proposed text, cause, and impact.
- Formal notices should be dated, indexed, and linked to the original work.
- The journal—not the author—makes the final classification and publication decision.
What This Page Covers
- Erratum versus addendum
- Correction versus corrigendum
- Decision criteria
- Submission workflow
- Examples and case studies
- Author checklist
Methodology and Academic Sources
This guide reflects common post-publication workflows used by scholarly journals and publishers. Terminology is not universal, so the most important operational rule is to check the author instructions and correction policy of the journal or publisher that owns the version of record.
What Errata, Addenda, Corrigenda, and Corrections Mean
The labels describe different ways to amend or supplement the published record, but publishers apply them differently. Start with the purpose of the change rather than the vocabulary alone.
Erratum
A notice that corrects an error in the published work. Under some publisher policies, the term is specifically used for an error introduced during production or publication.
Addendum
A notice that supplies significant supplementary information that emerged or was recognized after publication, while leaving the original work fundamentally intact.
Corrigendum
A correction commonly used for an author-originated error. Some publishers use it broadly, while others distinguish it carefully from erratum.
Correction
An umbrella label used by many journals for a formal post-publication amendment, regardless of who introduced the error.
A fifth mechanism, retraction, is not a stronger erratum. Retraction is used when the published work is unreliable in a fundamental way, when serious ethical problems affect the record, or when correction cannot adequately protect readers. An expression of concern may be issued while a significant unresolved matter is investigated.
Errata vs Addenda: The Practical Difference
The easiest distinction is to ask whether you are correcting existing content or adding new contextual content.
| Decision point | Erratum or correction | Addendum |
|---|---|---|
| Primary purpose | Repair an identifiable error in the published record | Supply important supplementary information |
| Relationship to original text | States what was wrong and what is correct | Leaves the original text but adds context, clarification, or information |
| Typical examples | Wrong value, unit, label, affiliation, equation, citation, author detail, or production change | New data-access note, omitted acknowledgement, material clarification, supplementary method detail, or later disclosure |
| Effect on conclusions | Should not invalidate the main conclusions; otherwise a stronger action may be needed | Should not be used to rescue unreliable conclusions or introduce a new study |
| Who decides | Journal editor or publisher | Journal editor or publisher, sometimes after review |
| How published | Formal notice linked to the original article; sometimes article version also updated | Separate linked notice or supplementary publication, depending on policy |
In books and reports, an errata sheet may also be a list of corrections distributed with a printed edition, while an addendum may be appended as an additional section. The same logic applies: one corrects; the other supplements.
How Do You Decide Which Notice Is Appropriate?
Classify the change by its purpose, origin, scale, and impact. A disciplined assessment prevents authors from understating a serious problem or overstating a harmless one.
Ask whether the existing publication contains an error
If a statement, number, unit, label, author detail, citation, method description, figure, table, or equation is incorrect, the request is corrective. That points toward an erratum, corrigendum, or correction. State precisely how readers could be misled and whether any result, inference, or recommendation changes.
Ask whether the information is genuinely new or simply omitted
An addendum may be suitable when a significant detail should be linked to the original work but is not a correction to a false statement. Examples can include an omitted funding acknowledgement, an important data-availability clarification, a newly identified procedural note, or information that helps readers interpret the work. The editor may still classify an omission as a correction, especially when the missing information should have been present at publication.
Ask whether the conclusions remain dependable
A formal correction is usually intended for a problem that can be fixed without overturning the work. If corrected calculations reverse the result, a figure was fabricated, a major dataset is unreliable, consent was invalid, or central methods cannot be defended, an erratum is unlikely to be sufficient. Disclose the full issue and ask the editor to assess the appropriate publication-ethics response.
Ask whether the proposed addition is actually a new study
Authors sometimes try to use an addendum to publish extra results after acceptance. Many publishers require genuinely new findings to undergo normal peer review as a new manuscript that cites the original. An addendum should not become a shortcut around editorial review.
Step-by-Step: How to Handle Errata and Addenda
Handle the issue as a controlled scholarly change. Preserve evidence, involve co-authors, and give the publisher an exact, reviewable request.
- Stop distributing an untracked replacement. Keep the version of record intact and do not silently substitute a local PDF.
- Verify the issue. Recheck source data, calculations, citations, proof files, correspondence, and the published HTML and PDF.
- Assess scope and impact. Identify every affected page, paragraph, table, figure, supplement, metadata field, and conclusion.
- Consult all authors. Agree on the factual description, proposed wording, and impact statement. Record any disagreement rather than hiding it.
- Read the publisher’s policy. Note its terms for correction, erratum, corrigendum, addendum, retraction, author-name changes, and metadata updates.
- Prepare a correction log. For each change, show location, current content, corrected or added content, reason, and impact.
- Contact the editor promptly. Use the official journal or publisher channel and include the article title, DOI, corresponding-author details, and supporting files.
- Respond to editorial questions. The editor may request raw data, co-author confirmations, peer review, institutional input, or revised figures.
- Review the notice proof carefully. Check that the correction itself contains no ambiguity and that it links accurately to the original publication.
- Update your records. Add the notice to your CV, repository entry, project page, and future citations where relevant.
Need a clear correction log?
Contentxprtz can help organize exact changes, impact statements, and supporting files before you contact the journal.
How to Draft an Erratum or Addendum Request
A strong request is factual, concise, and complete. It does not argue that the issue is “minor” before explaining what happened, and it does not leave the editor to discover which parts of the article are affected.
| Field | What to provide | Why it matters |
|---|---|---|
| Publication identity | Title, journal or book, DOI or ISBN, publication date, volume, issue, and pages | Prevents confusion with similar works or versions |
| Exact location | Page, section, paragraph, line, table, figure, equation, supplement, or metadata field | Allows editorial verification |
| Published content | The exact text, value, label, or file currently shown | Creates a transparent before-and-after record |
| Proposed content | The complete corrected text or clearly identified added material | Reduces interpretation and production errors |
| Cause | Author error, production error, omitted information, later clarification, or unknown pending review | Helps classify erratum versus corrigendum or another notice |
| Impact statement | Whether data, analyses, results, conclusions, authorship, disclosures, or reader safety are affected | Determines seriousness and remedy |
| Evidence | Annotated PDF, tracked changes, corrected figure, recalculation, source data, or co-author agreement | Supports a defensible editorial decision |
Suggested tone for the covering message
Use direct language: “We identified an error in Table 2, row 4. The published value is 0.41; the verified value is 0.14. The value was transposed during preparation of the final table. The corrected value changes the descriptive total but does not change the statistical test, interpretation, or conclusion. An annotated PDF and corrected table are attached.” This is more useful than “There is a small typo that needs fixing.”
Structure of an erratum notice
A typical notice identifies the original article, states the error and exact correction, explains the impact, and confirms whether the conclusions remain unchanged. It should avoid repeating the full article or introducing unrelated revisions.
Structure of an addendum
A typical addendum identifies the original article, explains why the additional information is being provided, presents the information clearly, and states whether it changes interpretation. It should distinguish post-publication information from content that was actually available at the time of submission.
Common Mistakes to Avoid
Most correction problems become harder when the request is vague, delayed, incomplete, or framed around reputational anxiety instead of reader accuracy.
- Calling every change an erratum: the publisher may use correction or corrigendum, while a true addition may need an addendum or new paper.
- Calling a major reliability problem minor: disclose whether analyses and conclusions change.
- Submitting only replacement text: include the published text, exact location, cause, and impact.
- Changing multiple passages without a log: use an annotated PDF or structured table.
- Adding new results without peer review: ask whether the material requires a separate manuscript.
- Ignoring co-authors: journals may require agreement from all authors, especially for authorship or disclosure changes.
- Editing repository copies silently: preserve links to the version of record and add the formal notice.
- Delaying until someone complains: prompt self-reporting supports trust and reduces downstream citation errors.
Practical Examples: Erratum, Addendum, or Something Else?
These examples show how the same “post-publication change” can lead to different outcomes depending on its purpose and impact.
A transposed value in a results table
Situation: A PhD scholar notices that 0.14 was published as 0.41 in one table.
Common mistake: Describing it as a harmless typo without recalculating totals.
Correct approach: Verify all dependent analyses, provide the corrected table, and state explicitly whether results and conclusions change. This is normally a correction, erratum, or corrigendum.
Expert support: An editor can cross-check the manuscript, tables, and narrative for inconsistent downstream references.
A missing data-access clarification
Situation: After publication, a research team finalizes controlled-access instructions required for qualified researchers.
Common mistake: Replacing the online PDF without a public record.
Correct approach: Ask the journal whether an addendum, data note, or correction is appropriate. Explain what became available after publication and how readers can access it.
Expert support: Research-support editing can make the access conditions precise, reproducible, and consistent with the original ethics approvals.
A corrected analysis reverses the conclusion
Situation: A first-time author discovers that the wrong dataset was used and the principal result no longer holds.
Common mistake: Requesting a one-line erratum to preserve the article.
Correct approach: Inform the editor immediately, provide the full evidence, and allow assessment for retraction, replacement, or another formal action. The issue is larger than a routine correction.
Expert support: Ethical editorial assistance can organize the chronology and evidence but should never minimize the consequence.
Errata and Addenda Handling Checklist
Use this checklist before sending a request to a publisher.
Classification
- Is the request correcting existing content or adding supplementary information?
- Does the publisher distinguish erratum, corrigendum, and correction?
- Could the issue require retraction, an expression of concern, or a new manuscript?
Evidence
- Have you verified the original data, source, calculation, and proof history?
- Have you identified every affected location and dependent statement?
- Do all authors understand and agree with the factual description?
Request package
- Article title, DOI, and corresponding-author details are included.
- Current and proposed text are shown side by side.
- Cause and impact are described without minimizing or speculating.
- Corrected tables, figures, supplements, and annotated files are attached.
After publication
- The notice links to the original article and the original links back.
- Repository and profile records point to the correction.
- Future citations and presentations use the corrected information.
How Contentxprtz Can Help
When a correction involves several files, co-authors, tables, or carefully worded impact statements, the administrative work can be demanding. Contentxprtz can support the author by checking consistency between the published article and proposed changes, creating a structured correction log, refining the covering message, proofreading the notice, and preparing annotated documents for editorial review.
The service is ethical and author-led. Contentxprtz does not decide whether the journal should publish an erratum or addendum, does not conceal the scale of an error, and does not guarantee acceptance of a correction request. The journal or publisher retains editorial authority, while the authors retain responsibility for data, conclusions, disclosures, and the accuracy of the proposed amendment.
Prepare a transparent, editor-ready request
Get help organizing corrections, added information, supporting evidence, and precise academic language.
Summary: Difference Between Errata and Addenda and How to Handle Them
Errata correct errors in published work; addenda provide significant supplementary information. Corrigendum may be used for an author error, while correction often serves as a broader publisher term. The labels vary, so the safest process is to document the issue, assess its effect on results and conclusions, consult co-authors, review the journal’s policy, and submit an exact request to the editor.
A routine correction should preserve the essential reliability of the work. An addendum should not become a route for publishing a new study without review. When the issue undermines the central findings, disclose that openly and let the editor determine whether a stronger action is needed. Transparent post-publication amendment protects readers, supports accurate indexing, and demonstrates responsible authorship.
Questions About Errata, Addenda, and Post-Publication Changes
These answers address the decisions authors most often face after discovering an error or important omission in a published work.
What is the difference between errata and addenda?
An erratum corrects an error in a published work, while an addendum supplies important new information that supplements the work without replacing the original argument. The exact labels vary by publisher: some journals use correction or corrigendum instead of erratum. Authors should follow the target publisher’s terminology and should not choose the label solely on their own.
When should an erratum be issued?
An erratum is appropriate when a published error is specific, verifiable, and important enough to correct the scholarly record, but does not invalidate the central findings. Examples include a mislabeled figure, an incorrect unit, a transposed value, a wrong affiliation, or text altered during production. Minor typographical errors that do not affect meaning may not warrant a formal notice.
When is an addendum appropriate?
An addendum is appropriate when important supplementary information becomes available after publication and improves interpretation of the original work. It should add context, clarification, data availability details, a missing acknowledgement, or another material update without pretending the information was part of the original publication. New research findings usually require a separate manuscript rather than an addendum.
Is a corrigendum the same as an erratum?
Not always. Many publishers use erratum for publisher-introduced errors and corrigendum for author-introduced errors, while others use correction as an umbrella term. Because conventions differ, authors should check the journal’s post-publication correction policy and use the label assigned by the editor.
Can an addendum change the conclusions of a paper?
An addendum should not be used to repair conclusions that are no longer reliable. If a newly discovered problem materially changes the results or conclusions, the editor may require a correction, retraction, expression of concern, or a new publication. Authors should disclose the full impact and let the journal decide the appropriate mechanism.
How do I request an erratum from a journal?
Contact the journal editor or publishing office promptly. Provide the article title, DOI, corresponding-author details, exact location of the error, current text, corrected text, explanation of the cause, impact on data and conclusions, and corrected files where relevant. For multiple changes, an annotated PDF or tracked-change document is useful.
How should an addendum be written?
Identify the original article clearly, explain why the additional information is being supplied, state exactly what is new, show how it relates to the original publication, disclose whether any interpretation changes, and provide supporting references or files. Keep the notice focused and transparent rather than rewriting the original paper inside the addendum.
Do errata and addenda receive their own DOI?
Often they do, because formal notices need to be indexed and linked to the original publication, but practices vary by publisher. The journal controls DOI assignment, citation format, linking, and whether the online article is also updated. Authors should cite the final notice exactly as the publisher displays it.
Should I silently edit a published PDF instead?
Generally no. Once an article is part of the scholarly record, meaningful changes should be transparent, dated, and linked to a formal notice. Silent replacement can confuse readers and citation systems. Publishers may correct minor metadata or formatting silently under limited policies, but authors should not alter archived versions independently.
Can Contentxprtz help prepare an erratum or addendum request?
Contentxprtz can help authors organize the correction log, compare original and proposed text, improve clarity, check internal consistency, prepare an annotated change file, and draft a professional message to the journal. Editorial decisions remain with the journal, and authors remain responsible for the accuracy and completeness of every correction.
Correct the Record Clearly, Promptly, and Proportionately
Finding a problem after publication is stressful, but the responsible next step is practical: verify it, document it, assess its impact, and contact the publisher. A precise correction or addendum helps readers use the work accurately and shows that the authors value the integrity of the scholarly record.
For complex manuscripts, Contentxprtz offers research support and academic editing to help authors prepare clear, consistent, and ethical amendment materials.
At Contentxprtz, we don’t just edit; we help ideas reach their fullest potential.