Personnel manager
Subject : My resignation
My name is ........... Presently I am working as a .......(ใส่ตำแหน่ง) in.....(ใส่ฝ่าย สังกัด) department.
Due to some personal reasons, I would like to resign effective .....(ใส่วันที่ที่คุณจะให้การลาออกมีผล)
Please treat this letter as my resignation request for your approval process accordingly.