Do not treat a scheduled supplier visit as permission to perform the proposed job in the United States. Review the activities, location and applicable immigration authorization before attending. A business itinerary does not resolve whether professional work is authorized.
Review the first activity, not just the payroll date
Include pre-start inspections, technical meetings and training in the schedule sent for review. Their labels do not decide the immigration analysis. Ask the employer to keep those commitments provisional until the actual activities and lawful start conditions have been assessed.
TN must involve prearranged professional work and cannot authorize US self-employment. Permission must exist before U.S. services begin; an offer letter is evidence, not a work permit.
A client’s release of information does not authorize work while an immigration requirement remains unresolved. A supplier visit that includes hands-on troubleshooting, sign-off on specifications, or direct instruction to on-site staff can move the assessment away from a short observational trip and toward professional-level work. Compare each planned task against the duty description used for the file rather than assuming the visit's stated purpose covers everything on the agenda. Treat any badge, workstation, or system access issued for the visit as a logistics step, separate from any immigration determination. Flag a late addition to the agenda with counsel before it happens, since a task added after the file is prepared may fall outside what was reviewed. An employer's assurance that a visit is routine does not substitute for matching the actual agenda to the professional activity described in the petition.