Read the general professional work overview
For an L’Île-Perrot applicant, an updated offer can leave an older support letter in circulation. Review the documents together so the requested professional arrangement is the one the employer actually intends. Documents drift apart quietly: an offer is renegotiated by email, a letter stays as first drafted, and work begins on terms nobody has written down. Compare all three against each other before anyone travels, since the version presented is the version that will be assessed.
Identify the version the employer stands behind
Put the offer, proposed duties, compensation and intended duration beside one another. Hypothetical example: an offer is revised after a supervisor changes the assignment, but the supporting letter still describes the original work. Ask the employer to resolve the discrepancy accurately rather than choosing whichever version appears stronger.
Check the profession against the revised duties
TN is for eligible Canadian or Mexican citizens performing a listed professional activity with its prescribed qualifications. A changed assignment needs a fresh fit assessment; keeping the same job title does not settle it. Use the actual credential and any alternative the profession permits. Degrees from institutions outside Canada, Mexico and the United States require reliable foreign-credential evaluation.
Preserve the real arrangement and the decision point
Explain who employs the applicant, what professional services will be performed and why the proposed stay is temporary. TN cannot cover services to a U.S. entity solely owned or controlled by the applicant. A signed revision is evidence to assess, not independent permission to start the revised U.S. work.
An amended contract binds the parties; it does not update a letter already sent
Amendment mechanics belong to contract law: a signed variation replaces the earlier term between employer and employee the moment both agree to it. None of that reaches a support letter already printed, couriered or handed over, which continues to describe the arrangement as it stood. Treat such a letter as a statement made on a date rather than a living document, and have it reissued whenever the underlying terms move. Ask for a dated, signed replacement referring to the current offer, and keep the superseded version rather than discarding it, because being able to show what changed and when is worth more than a file holding one tidy account.
A licence to practise and a listed profession’s qualification are separate tests
Regulators grant licences to protect the public; the appendix sets out what a given profession requires for this classification, and someone can satisfy one without satisfying the other. Where a listed entry calls for a specific degree, experience does not stand in unless that entry says it may; where a state requires a licence, that requirement sits alongside the classification’s own rather than in place of it. Read the entry for the profession that will actually be performed after the revision, match it against the credential in hand — degree, transcript, and a reliable evaluation for a degree earned outside Canada, Mexico or the United States — and note which document answers which element.
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.