Does the tested sample match the work in the expert dispute?
The report relies on a sample number
Imagine an expert report criticises your work using a laboratory result labelled with a sample code. The report's site description and the sample register appear to refer to different locations.
Identify the factual discrepancy before arguing about the technical result. A reliable response needs to establish what was tested and how it relates to the work being disputed.
Trace the identifiers through the records
Collect the relevant sampling record, location information, photographs, laboratory reference and report appendix through authorised channels. Keep original labels and documents intact.
Prepare a simple cross-reference showing how each identifier connects to the next. Mark missing links explicitly rather than filling them from memory or assuming similar codes refer to the same material.
Separate observation from inference
Record what the documents actually show and what remains an assumption. The Judicial Commission of NSW's Civil Trials Bench Book discusses distinguishing the factual basis of expert opinion from the opinion itself.
Use that distinction to frame a question for your lawyer and appropriately qualified expert. The guidance does not mean that every labelling error invalidates a report or that an unexplained code proves the tested sample came from elsewhere.
Source: Judicial Commission of NSW: Civil Trials Bench Book — Opinion
Preserve the material and the uncertainty
Do not relabel, alter or discard relevant samples or records to make the file look consistent. Ask your adviser and expert how material should be preserved and whether further information or testing is appropriate.
Avoid arranging destructive testing or interfering with the other party's material without proper authority and advice. The immediate task is a clear factual enquiry, not an improvised attempt to produce a competing result.
Ask the focused technical question
Give the adviser the exact mismatch and supporting references. Ask what explanation would establish the sample's identity and whether the uncertainty affects the expert's particular conclusion.
Keep technical significance and legal consequences for the relevant specialists. A business owner can identify a document discrepancy without asserting expertise about the test method or how a court must treat the report.
Build one sample trail before the response
For the disputed result, assemble the identifiers, source records and unresolved questions in a short schedule. Preserve the complete report and appendices alongside it.
That gives the response a concrete basis. The useful issue is whether the tested material is properly connected to the work under discussion, rather than a broad accusation that the expert must be wrong.