Letter of Joining the duty is used to inform the employer that you have joined the letter and will continue the job from the date and will require that pay should be calculated from these days.
Sample Letter For Reporting Attendance
28th May, 20.. (Write Year)
I am grateful to you for offering me the post of a Section Officer (Accounts) in your esteemed institution and I gladly accept the above offer and will report for duty within a week.
I may hereby assure you that I will spare no pains in the discharge of my official obligations pertinent to ray post.