Use it as historical evidence where relevant, not as an updated account without verification.
Obtain present confirmation
Keep dates accurate and identify which terms remain effective. A familiar employer does not make obsolete information current.
Gather the most recent approval or admission record, the original and any updated duty letters, proof of continued qualifying employment, and current credential documentation. If the reissued letter differs from the original in duties, title, salary, or dates, that difference should be explainable by something real, such as a restructure, rather than by editing. The letter supports a specific listed profession, so it needs the duties that show professional work at that level, the credentials relied on, the employer's identity, the arrangement's expected duration, and how the professional will be paid. The employer letter should be on letterhead, signed, and should name the profession as Accountant, describe the duties as accounting, cite the designation, state Canadian citizenship, give the term and salary, and say the position is temporary. Corporate formation records resolve employer identity; the signed letter resolves the proposed engagement; transcripts and licences resolve qualifications. Once the letter is right, the supporting documents simply corroborate it: proof of Canadian citizenship, the degree with a transcript, the provincial licence in good standing, and evidence of any experience the profession's rule requires.