Before relying on a materially changed employer, ownership or duty arrangement. Provide the effective dates and revised terms so counsel can assess whether further immigration steps are needed.
Do not let the option deadline decide the legal sequence
Ask the commercial parties what happens if the immigration review is not complete when an exercise date arrives. Keep work authorization separate from an agreement to invest. The applicant should not assume that an initial TN plan automatically covers a later role in a differently controlled business.
Build a sequence from the employer's final letter, credential readiness, any licence issue, the intended request or filing method, inspection or adjudication outcome, and the individual's actual admission record. A professional order may take weeks to issue a confirmation of standing, a university transcript request has its own queue, and a U.S. employer's legal department may revise the letter several times. Sequence preparation from the employer's genuine start need backward: confirm citizenship, classify the occupation, test its minimum credential, obtain the letter or contract, and only then choose travel or Form I-129. Sequence the analysis before the first productive US workday: identify the professional category, assemble the employer record, choose the appropriate entry or petition route, and obtain the required permission.