It provides history but does not replace assessment of the actual current case.
Compare the facts behind the outcomes
Identify changes to duties, employer, qualifications or ownership. Do not present a previous decision as a guarantee when the proposal or supporting facts have changed.
Start with the contracts and proposed duties, then compare each part with the TN requirements: Canadian or Mexican citizenship, a listed profession, its credentials and temporary entry for prearranged professional work. Present the current registration certificate and, if available, a letter of good standing from the provincial body, because an expired or lapsed registration does not satisfy the rule. A first conversation should compare the applicant's actual credentials against the specific listed profession's requirements, rather than assuming transferable skill or workplace experience closes the gap. Start by naming the exact USMCA profession, then compare its stated education, licence, and experience criteria with the actual foreign award. The most useful record is a current employer letter supported by a detailed job description and the credential required for the named profession. The actual duties, employment arrangement and qualification requirements matter more than a shared title. Settle the credential question before paying for registry copies, because a qualification that does not match the listed profession will not be rescued by a flawless identity chain, and those copies would then buy nothing.