Typical scenario

A sample number differs between the collection record and report

Suppose a biological sample has one number in the collection record and another in an appendix to a DNA report. A participant suspects substitution, but the documents contain no explanation of the laboratory’s internal identifier.

What needs to be clarified

Trace the documented connection between the participant, packaging and examined sample without treating a missing entry as an established accusation.

Materials to prepare

  • The complete report, appendices and list of examined samples
  • Collection, packaging and transfer records showing original identifiers
  • Registration details and available correspondence about the number change

What to compare

  • Compare identifiers at each documented transfer stage
  • Identify entries linking the old number to the new one
  • Separate supported information from questions requiring the laboratory’s explanation

Possible outcome of the analysis

A possible outcome is a sample comparison table and a focused request about the missing documentary link.

Limits of the conclusions

A number mismatch alone does not prove substitution, and documentary review does not replace laboratory testing.