Use whatever contemporaneous evidence exists — internal notes, project files, correspondence, or third-party records — to document how the knowledge was developed and applied. A lack of formal HR-style training records does not mean the claim cannot be supported, but it does mean more care is needed in gathering what actually exists.
Reconstruct evidence honestly rather than creating it after the fact
Ask company personnel who were present during the relevant period to help identify and date existing records, and avoid producing new documents that present a current recollection as if it were a contemporaneous record.
More detailed exhibits may describe training modules, project phases, system architecture, quality controls, or implementation decisions without publishing sensitive source code or customer data. The standard has two branches: special knowledge tied to the organization’s products and services, its research, equipment, techniques, management, or other interests as applied internationally; or advanced knowledge of that organization’s processes and procedures. Incident reports, post-project reviews, deviation investigations and the notes explaining why a method was changed all show judgement being exercised under pressure, and they are dated, made for another purpose, and difficult to characterise as self-serving.