A formal letter that tells your future employer that you have accepted the job offer is known as a job acceptance letter. Learn how to write a professional job offer letter acceptance mail reply with joining date with an easy format and practical samples.Job offer acceptance letter samples. I am writing to confirm my acceptance of your employment offer on April 20 and to tell you how delighted I am to be joining XYZ Corporation in Chicago. Your first official day in your new position will be Date. Find out job offer requirements for Express Entry and who needs a Labour Market Impact Assessment (LMIA). How can I obtain proof of my alumni status? View individual programs to see admission requirements and application deadlines.