Review the actual revised services and any implications for the selected category and process.
Keep the professional account current
A new deliverable may clarify or materially change the job. Do not rely on the old description simply because it used a more favourable professional label, and do not begin US work without the applicable permission.
Pause preparation when deliverables change and compare the revised work with the profession originally selected. The applicant should obtain the updated scope, start date, duration, reporting arrangement, and compensation before deciding whether the existing support letter remains accurate. TN still requires Canadian or Mexican citizenship, advance arrangements for work in a listed USMCA profession, and satisfaction of that occupation’s particular credentials; it cannot be used for self-employment. For a Canadian, a fresh port-of-entry presentation may be appropriate, or an employer may use Form I-129; neither permits altered work before authorization. The usual timing error is keeping the planned start while leaving a material scope review until after travel.
Hypothetical example: An industrial designer near Petit-Saguenay originally agrees to create product drawings, but the customer later adds vendor negotiations and general market strategy. The designer asks for a signed revision and sorts design functions from the newly proposed commercial tasks. Counsel can then assess whether the same listed profession still describes the assignment and whether updated documentation or a different process is needed. Travel remains on hold until that decision is supported, rather than relying on the favourable wording of the first contract.