Have the responsible parties explain the genuine assignment and preserve the relevant records. Do not select whichever document sounds more favourable.
Resolve the supervision and service scope
A difference may concern who controls the work or whether the placement actually requires the petitioner’s product or service knowledge. Identify those material facts before relying on the proposal. A support letter cannot rewrite the customer arrangement that will operate in practice.
Documents the company generated about its own systems: authored protocols, internal training curricula and completion records, laboratory specifications, change approvals, and a count of employees able to operate the systems unaided. Artefacts generated by the proprietary work: design documents, release notes, revision histories naming the specialist, internal training records, and customer contracts describing delivered systems. An employer that has genuinely built procedures around a supplier’s equipment usually holds a controlled document register: numbered procedures, revision dates, and a named author or approver for each version. Preserve dated drafts, revision histories, technical notes, project assignments, performance records, and statements from knowledgeable supervisors explaining what the employee created, adapted, or approved.