How to verify a deposition summary against the transcript
Deposition summaries from vendors or AI can reverse testimony, misquote a witness or cite the wrong page. How to check each entry against the transcript.
Key takeaways
- A summary entry is a claim about testimony. Check it against the page and line it cites.
- The costly errors are reversals, invented quotations and answers attributed to the wrong speaker.
- Read the question and the answer together, and check for later corrections and errata.
- Check first the entries you will rely on in motions, outlines and witness preparation.
Deposition summaries save hours. Whether they come from a court reporting vendor, a paralegal or an AI tool, each entry condenses testimony into a line or two, and each one can be wrong in ways that matter later, when the summary is quoted in a motion or used to prepare a witness.
Three kinds of deposition summary
- Page-line digest: a chronological list of topics with page and line references.
- Topical summary: testimony grouped by issue, often across several sessions.
- Narrative summary: a prose account of what the witness said.
All three make claims about testimony. The more condensed the summary, the more interpretation it contains.
What goes wrong
| Error | Example |
|---|---|
| Reversed testimony | The summary says the witness approved the change; the witness said they did not |
| Wrong speaker | Counsel's question is summarised as the witness's statement |
| Invented quotation | A sentence in quotation marks that does not appear in the transcript |
| Wrong cite | The testimony exists, but on a different page |
| Lost qualification | "I believe so, but I would have to check" becomes "yes" |
| Corrected testimony | The witness corrected the answer later, or on the errata sheet |
AI-generated summaries are fast and usually fluent, and they are prone to the same errors, especially confusing who is speaking in a question-and-answer format.
A method for checking each entry
- Go to the cited page and line. If the testimony is not there, search the transcript for it before marking it wrong.
- Read the question and the answer together. Confirm the words are the witness's, and what they were answering.
- Check quotations word for word. Anything in quotation marks must be verbatim.
- Look for later corrections. Read a little further, and check the errata sheet.
- Mark the entry. Accurate, inaccurate, or not found, with a note on what the transcript actually says.
Start with the entries that will be quoted or relied on. A summary that feeds a summary judgment motion deserves a full check.
Deciding what to check first
A full summary of a long deposition can run to hundreds of entries, and not every entry carries the same risk. A sensible order:
- Entries that will be quoted in a brief, motion or expert report: check every one, word for word.
- Admissions and key denials on the issues in dispute: check the answer and the question that produced it.
- Entries used to prepare witnesses or plan cross-examination: check the substance and the cite.
- Background and biographical entries: spot-check a sample, and check more if the sample shows errors.
If a spot check finds a reversed or invented entry, treat the whole summary as unverified until it has been checked in full.
Checking a summary with CiteLLM
Attach the transcript, and the errata sheet if there is one, and paste the summary entries as claims to check. With CiteLLM in ChatGPT or Claude, each entry comes back supported, contradicted or not in the transcript, with the testimony highlighted on the page.
- A reversed entry is marked contradicted, with the answer that disagrees on screen.
- A quotation that does not appear in the transcript is never highlighted.
- The evidence report records your decision on every entry, for the case file.
CiteLLM shows the PDF page of each passage. Confirm the transcript's own page and line numbers on the highlighted page before citing them.
Frequently asked questions
How do I handle errata sheets?
Attach the errata sheet as a second document in the same review, so corrected answers are checked alongside the original testimony.
Does it work with long transcripts?
Yes, as long as the transcript is a text-based PDF. Very large files may need splitting, depending on your plan.
Can AI write the deposition summary too?
It can draft one, and the result should be checked the same way as any other summary. Many teams draft with AI and verify every entry they plan to rely on.