No. The employer’s acceptance does not replace evidence of the listing’s specific credentials.
Identify the credential itself
Provide the genuine qualification record and assess any required evaluation or separate professional licensing issue. A contractual warranty is not an immigration credential determination.
The employer letter needs to say the position is Registered Nurse, describe the duties, state the length of the assignment and the salary, and identify the licence or degree it relies on. TN eligibility still turns on Canadian or Mexican citizenship, a prearranged engagement in a USMCA-listed profession, and compliance with that listing’s particular qualification rule. A degree from outside Canada is acceptable, but it usually needs a credential evaluation showing United States equivalence, and every document not in English requires a complete certified translation. Credential evaluations, translations, and employer letters tailored to this route have no value if the applicant does not hold qualifying citizenship, and they rarely transfer cleanly to a different route with different requirements. If the degree was earned at an institution outside the three USMCA countries, obtain a credential evaluation from a reliable service before applying, since the regulation requires it and a port-of-entry officer cannot supply it.