Dear student,

Here is the letter below:

To,

The Principal,

--------------------(Name of the college)

-------------------(Address of the college)

Sub: Application for my attendance in  exam - Regarding.

Sir,

With due respect, I am to say that I have appeared in my  examination of .......................(department, semester, subject) which was conducted on ....................(date) in the college. But I shocked to know that my attendance was marked with absent. So, somewhere mistake have occurred while filling attendance sheet. Hence, it is my humble request to you that kindly take necessary action to make my candidature present for the above said  examination.

Thanking you,

Yours faithfuly,

----------------------(Signature with date)

-----------------(Name)

(Department, semester) ..................................(subject)

Hope this will help you.