[These Sample application letter formats are applicable to apologize after leaves without permission from the school, college, office or government office and hospital etc. You can modify these format as your requirement.]

Date …

The Administration Manager,

Institute Name…

Institute Address…

Sub: Letter for Leave without Permission

Respected Sir,

I am writing this letter to apologize that I could not come to the office for previous two/three days (Date) to (Date) of (month name), without submitting any leave application. It all happened because of unforeseeable circumstances, as I had to bear the brunt of a severe heat stroke and I was hospitalized for two/three days. (Show your actual situation) So, I could not inform you at that time. Now, I have been discharged and I am recovering rapidly.

I hope you would understand my condition and accept my apology.

Sincerely,

Name…

Job Designation…

Contact no…

Signature.

Date…

The Managing Director,

Institute Name…

Institute Address…

Respected Sir,

Hope this letter finds you in best of your spirits. Yesterday, I have been issued a memo from the HR office for the leave without permission. I want to clarify my situation through this letter. My younger brother got an accident that day and I left the office in a hurry after receiving a call from the hospital. I left the office so urgently that I forgot informing this office.  He has yet not recovered and in the ICU. I apologize for not dealing the situation well and request to kindly to close the memo. I assure you that I will avoid such inattention in future.

Thank you

Yours Sincerely,

Name…

Job Designation…

Contact no…