Hello aspirant,

They are similar as offer letter. ... offer letter is the written application which you got when you are selected during interview. Job letter is same as offer letter in which profile, salary is mentioned. joining letter is again written letter in which date, time and other details of joining to job are given.

Joining report is important in the job sector or company with the larger business network as surety of employee joining to issue the salaries, benefits and getting the work performance reports.

thankyou