Before an employer drafts a support letter, identify precisely what the file needs to establish: citizenship, a genuinely identified professional position, and the qualification the listed occupation actually requires. Where a staffing agency and an end client are both involved, resolve any difference between their descriptions of the work first. That produces a file a reviewer can test, without letting two accounts of the same job quietly diverge.
Start with the two accounts of the same assignment
Hypothetical example: a Windsor-area applicant's staffing agency describes the assignment as systems analysis, while the end client's internal work order describes mostly help-desk support and equipment setup. Ask both parties for their own written description of the actual duties. Preserve any genuine difference in the working account rather than letting the more favorable version quietly stand in for the whole role.
Keep employer facts and credential facts on separate tracks
The employer confirms the role, pay, and intended duration; the applicant supplies the actual qualifications and identity evidence. Keep original credential names intact and identify any translation or evaluation the process actually requires. An employer's confidence in the candidate is not proof of a degree or a licence — confirm which listed qualification genuinely applies before collecting unrelated records or paying for extra services.
Resolve any discrepancy before anyone signs
Compare the agency contract, the client's work order, and the proposed support letter side by side. Identify which version is current and ask the responsible party to explain any material change. Disclose ownership interests and the real employer relationship. The finished account should describe the job the applicant will actually perform, with open questions flagged for legal review rather than papered over with consistent-sounding wording.
What else is on your mind?
Is a matching job title enough for TN?Can years of experience replace a degree for TN?Can my own U.S. company employ me under TN?Can my spouse work if I hold TN status?Editorial source review: 2026-09-07. General preparation guidance, not an individual assessment.