Review the actual activity; TD does not authorize employment.
Separate an invitation from lawful work participation
The principal’s employer may include families in some events, but a work assignment cannot be assumed permissible merely because it is called training or is unpaid. Establish the spouse’s own lawful basis for any proposed employment.
First describe exactly what the spouse would do during the company session: observing a social welcome is different from completing exercises, serving customers, producing work, or training for a future U.S. job. TD dependants may study, but TD status does not authorize employment, whether the activity is paid, unpaid, remote, or labelled orientation. Keep the principal’s TN evidence separate: Canadian or Mexican citizenship, a prearranged position in a listed USMCA profession, and compliance with that profession’s qualification rule. Canadian permanent residence alone cannot supply TN citizenship. The usual mistake is relying on the employer’s invitation instead of analyzing the spouse’s own conduct and status.
Hypothetical example: A dietitian from L’Anse-Saint-Jean obtains TN work with a U.S. healthcare contractor, and the contractor invites her spouse to a nutrition-platform training day. If the spouse would practise order entry and later cover accounts, attendance may be employment activity that TD cannot support. The couple should review the agenda, identify any deliverable, and decline work components unless the spouse independently obtains authorization. The dietitian should meanwhile document her listed profession, credentials, employer-directed role, and lack of self-employment rather than blend the family invitation into her application.