A job offer letter is a document that a Canadian employer gives you (as a temporary worker). It explains the details of your job.Find out job offer requirements for Express Entry and who needs a Labour Market Impact Assessment (LMIA). A job offer letter from a Canadian employer is a crucial document for obtaining a work permit and potentially immigrating to Canada. Job Offer Letter for Canada PR: Understanding the Content and Requirements - YouTube. This content isn't available. Read your offer letter carefully. Focus on the details mentioned above, and respect the deadline to respond. Travel Advice and Advisories from the Government of Canada for United States (USA) USPS offers a wide range of career opportunities that offer promotion and benefits.