It should accurately identify the assignment, dates and authority granted, supported by the real work performed.
Keep planned and effective authority separate
A promise of later promotion is not proof that the applicant already holds that role. Provide any extensions or changes rather than relying on an expired appointment.
The continuous year abroad is established by dated employment records: payroll registers, T4 slips, a letter from the Canadian company stating start date and position, and evidence of the duties performed during that year. Appointment or promotion records for the person taking over, signing authorities updated with banks and counterparties, revised organizational charts, and correspondence showing they now make the decisions. The persuasive material is usually mundane: payroll summaries, signed appointment letters, minutes recording an appointment, and charts prepared at the time rather than for this purpose. Employer identity and the corporate link are settled by registers and ownership charts; continuity of employment by payroll registers and the leave ledger; duties by dated organisation charts and the assignment letter written at the time. Ask for the papers that existed before the transfer was contemplated: the organisation chart in force, the delegation-of-authority schedule, payroll records naming the successor, and the minute recording the appointment. The personnel bundle proves one continuous qualifying year abroad and describes the American role's authority through an organizational chart with named positions rather than empty boxes.