Identify the appropriate record holders and preserve relevant employment, project and training evidence through authorized channels.
Keep names and dates understandable
Explain changes in company names, systems and responsibilities without altering original records. Mark missing evidence and ask who can verify the facts. A transfer of archives should not be presented as proof of the immigration requirements.
Identify what a record establishes about the applicant’s interpretation or application of the method. The US assignment plan should connect the documented company knowledge to specific tasks and retain petitioner control over any offsite placement. When an acquiring entity's retention policy has already destroyed originals, look for secondary sources that were generated independently at the time, such as system exports or communications that referenced the same record, rather than recreating the document from memory. Note who currently controls each surviving source and whether that custodian remains reachable, since an unreachable custodian weakens what a record can establish. Where responsibilities shifted between entities during the transfer, describe the shift itself as part of the specialized-knowledge history rather than leaving a silent gap in the timeline. Keep the explanation focused on what a surviving source can actually prove about the applicant's own role, not on the completeness of the archive as a whole. Connect any gap directly to the proposed United States duties so a reviewer can see why the surviving material still supports the claimed specialized knowledge despite the incomplete archive.