You have finished a chapter when the publisher of a report you cited posts a correction. First, compare the correction notice with the passage or data you used. Mark the sentences and charts in your thesis that depend on the corrected information. Update the data and any conclusion you drew from them, then point your reader to the document that gives the correction.
Work out what the notice corrects
An erratum is a notice from a publisher about an error in a published document. It may cover a single row or several places. Get the report and the notice from the same official site. Check the title, year, page and scope of the change. The date on the notice tells you when the error was corrected. The period covered by the data is a separate detail.
In a copy of your chapter, search for the report title, the relevant label from the table and the old figure. Check the results one by one. The same number elsewhere could describe a different group. Keep a separate note of what the source reports and what you calculate yourself.
An example from a thesis on municipal education
You are writing a public administration chapter on how primary schools are organised. Your draft paragraph and chart use Table 18 on page 55 of the 2024 report on the municipality of Malechowo. The report and its correction notice are real. The example sentences are invented.
The original report and the official correction
In the part covering the end of the 2023/2024 school year, the total row for primary schools gives 23 teachers and 22.329 full-time equivalents (FTEs). The same two figures appear in the row for the school in Lejkowo. The table lists three other primary schools. The four headcounts add up to 23 + 20 + 21 + 21 = 85 teachers.
The correction notice of 25 June 2025 confirms 85 teachers and 85.418 FTEs in that row. It also corrects two cells for administrative and support staff. Use the two relevant columns when writing about teachers. Headcount counts people. Full-time equivalents express the amount of staffing in units of a full-time post.
A paragraph before and after the correction
Before. At the end of the 2023/2024 school year, the four primary schools covered by the report employed a total of 23 teachers. Staffing at these schools amounted to 22.329 FTEs.
After. At the end of the 2023/2024 school year, the four primary schools covered by the report recorded a total of 85 teachers and 85.418 teaching FTEs. The figures come from the correction to Table 18 of the 2024 report on the municipality of Malechowo.
In the second part of Table 18, for the 2024/2025 school year, the report already gives 85 teachers. If your draft says the figure rose from 23 to 85, remove that claim. With the correction, both entries show 85. The reported counts match. They do not tell you whether the schools employed the same people.
Check your charts and later conclusions
If the chart was labelled “Number of teachers”, change the point from 23 to 85. In a chart of FTEs, the change is from 22.329 to 85.418. Update the underlying chart data and check the label in the final document. Cite the report and its correction alongside the chart so readers can trace the figure.
In the report, 23 is still the teacher headcount for the school in Lejkowo for the same period. Replacing every 23 with 85 would introduce a new error. If you used the old total to compare Malechowo with another municipality, check both figures again and revise the comparison. The units and reporting periods must match. Staffing figures alone do not establish the quality of teaching.
Separate passages that rely on the corrected row from those based on other figures. The Malechowo notice also corrects the number of sports scholarships on page 59. If your chapter uses that figure, check that passage separately.
Show readers where to find the report and correction
The example below identifies both documents. Use the reference order and style required by your degree programme. When the report and the correction are separate files, provide enough information to identify each one. The Lodz University of Technology Library advises taking reference details from the document you cite. The example shows what information to include in the format your programme requires.
Example footnote. Municipality of Malechowo, Raport o stanie Gminy Malechowo za rok 2024, p. 55, Table 18, total for primary schools at the end of the 2023/2024 school year, taking into account Errata do Raportu o stanie Gminy Malechowo za rok 2024, 25 June 2025, item 1.
If the publisher has released a complete corrected document, open that version and check the page again.
If you still need to identify the publisher’s version, see “How to find literature for a bachelor's or master's thesis”.
Checking references to sources
How do you check citations and sources during a thesis audit?
I compare references in the text with the bibliography, check citation markings and the way paraphrases are handled. For available publications, I also analyse the consistency of the indicated fragments with the sources. You will receive a list of comments with the location of problems and the order of corrections. Analysis of the provided JSA report and text editing can be added to the agreed order.
Sources
- Municipality of Malechowo (2025). Raport o stanie Gminy Malechowo za rok 2024, pp. 55 and 59.
- Municipality of Malechowo (25 June 2025). Errata do Raportu o stanie Gminy Malechowo za rok 2024, items 1 and 2.
- Lodz University of Technology Library. Bibliografia i przypisy, section on preparing bibliographic descriptions. Accessed 10 November 2026.
Discuss revisions after a source correction
Tell us which source was corrected and where it appears in your chapter. Gather the report, the correction notice and the relevant draft passage. We can agree whether to review one paragraph or check the charts and references elsewhere in the thesis as well.
Tell us about the corrected source
