Compare the offer letter, the bonus or retention agreement, and any support letter the employer prepares for the immigration case. Job title, duties, work location, and employment start terms should match across all three. Discrepancies are easier to fix before signing than to explain afterward.
One role, described the same way everywhere
Bonus agreements are often drafted by a compensation team that never sees the immigration file, so they can carry an internal job title or a broader duty summary. Ask for the drafts side by side and mark any difference in title, reporting line, or described responsibilities. Where the documents disagree, ask the employer to correct the wording rather than deciding privately which version to rely on.
Put the passport and the employer letter on top, because the officer's first questions are who you are and what you are coming to do. A first review should sort the file by proposition: identity and citizenship, employer, position, qualification, and intended period. Pause submission until the employer identifies the controlling offer and corrects both language versions. TN remains limited to Canadian or Mexican citizens who fit a listed USMCA profession and its particular qualification; it cannot support self-employment.
Institutions differ in what they offer: a replacement parchment, a certified true copy, an official transcript, or a registrar's letter confirming the degree and conferral date.