[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.