Retain legitimate employment, role and corporate records that are relevant to the proposed transfer and that you are entitled to obtain.
Identify the future record holder
Ask who can verify dates, duties and entity information after the transaction. Keep executed documents separate from proposed terms. A later narrative may help explain the history, but it should not replace available contemporaneous evidence or disguise gaps.
Financing documents with their conditions visible, board minutes approving the revision, correspondence showing when the delay arose, an updated hiring and premises schedule, and updated financial projections that reconcile with the funding actually available. Start with the ownership chain: certificates of incorporation for each entity, current share registers or membership schedules, and the purchase agreement and closing documents for the American operation, so that a reader can trace control from one company to the other without inference.
An accurate organizational chart, a written description of the function's scope and decision rights, evidence of the specialists who execute the function even without a direct reporting line, and documentation of the qualifying corporate relationship between the two entities.