Gather the diploma, an official transcript from the current custodian and a registrar or archive letter connecting the institution names. For a USCIS filing, foreign-language documents require full certified English translations. A degree from an institution outside Canada, Mexico and the United States separately requires a reliable foreign-credential evaluation under the TN rule.
Ask the registrar for one explanatory letter
A short letter on institutional letterhead stating that the former school merged into the current one on a given date, that the program continued, and that the transcript reflects the same records does more than several pages of applicant explanation. Request it early, since registrars handling historical files can take longer than their standard processing times suggest.
Once the job is described truthfully, the letter should state the employer's name and address, the professional title and duties, the period requested up to three years, the salary and how any variable pay works, and the statement that the applicant holds the required degree. Build the TN file from authentic records: a signed offer or contract, an employer letter describing the actual professional services, proof of Canadian or Mexican citizenship, and evidence meeting the selected USMCA profession’s qualifications. The letter should state the US or foreign employer, identify the U.S. entity for which the professional activity will be performed, and give the professional duties, compensation, anticipated duration, and reason unrelated departmental material appears in the larger document.