Leave letter is written to inform your absence from office. Here is a sample of leave letter for office.
Subject: application for leave
Dear Ms/Mr. ____________
With due respect I wish to inform you that owing to family dispute arising back in my native village I cannot be available in the office from 12 march to 20 march.
Due to this sudden family crisis , I am forced to visit my village and assist my family. My presence is vital and important on occasion.
Kindly grant me 3 days leave from 12march to 20 march 2010 in this regard.