The Head of Department,
___________ (Name of the Department),
___________ (Name of the Tnstitution),
___________ (Address of the Institution)
Date: __/__/____ (date)
Subject: Apology for being absent
Most humbly, this is to inform you that my name is _____________ (name) and I am a student of __________ (mention class) having roll number/student ID _____________ (mention ID/roll number).
I am writing this letter to sincerely apologise for my absence from the Institution from __/__/____ (date) to __/__/____ (date). The reason for the absence is due to ____________ (mention reason for being absent). I apologise for not giving a prior notice but it was all unexpected due to which I was unable to inform you regarding the same.
I hope that you will understand my situation and I will ensure that I will work hard to cope up with my studies, which I missed during my absence. I promise you that I will not repeat this mistake again in the future. Kindly, accept my apology and try to forgive me.
___________ (Roll number)
___________ (Contact details)