IN THIS GUIDE · Separating an employer's security or background clearance condition from immigration authorization, and planning around a delayed start
Start with the TN eligibility and application overview
Confirm the role is open to the applicant
Some US positions, particularly those tied to government contracts or restricted facilities, limit access on grounds unrelated to immigration status. Ask the employer directly, in writing, whether the clearance the role requires is available to a Canadian or Mexican citizen who would be working in TN status. An answer that arrives after credentials have been assembled is an expensive answer. TN has distinct admission procedures: a Canadian may generally request classification at inspection, while an employer may petition USCIS when that route is needed. Neither procedure permits self-employment. Hypothetical example: a forensic mycologist receives a laboratory offer conditioned on access to a controlled collection. The first review compares the signed offer with the access rule. The decision is whether the employer can retain the position until clearance is decided.
Keep the two authorizations distinct
Admission in a classification does not satisfy an employer's clearance requirement, and passing a background check confers nothing on the immigration side. TN rests on citizenship, a qualifying listed profession with its own credential alternatives, prearranged professional employment, and temporary entry. The clearance sits in the employment contract. Track them as two separate conditions, each with its own owner and evidence.
Pin down what the start date depends on
Ask whether the stated start date is fixed or contingent, whether pay begins on hire or on clearance, and what the person is expected to do in between. A written answer turns a vague conditional offer into something counsel can work with. It also reveals whether the employer has planned for a gap or is assuming the applicant will absorb it.
Sequence entry against the real first day
Arriving well before any work begins raises questions about the purpose of the trip that the applicant should not have to improvise at inspection. Discuss the sequencing with counsel, including whether to wait for the clearance outcome before seeking admission. Nothing that looks like work should happen in the interim on the assumption that the offer is settled.
Assemble credential evidence against the actual listing
Canadian citizens may present the TN application to CBP at a port of entry or preclearance location. Compare the day-to-day duties with the wording of the chosen listing, then identify the record that proves each qualification: a diploma and transcript, a licence, or dated experience evidence where that listing permits experience. A first-pass credential review identifies the exact degree or designation, issuing institution, and any missing comparison document. A letter drafted by human resources for a general hire often omits the specific USMCA language, and an officer at a port of entry cannot infer what is not written. If the degree was earned outside Canada, Mexico or the United States, the regulation requires a credential evaluation from a reliable service, which should be obtained before the port-of-entry trip, not requested afterward.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.