Start the letter with your name in the first line followed by your designation, employee ID (if any), Department and the contact information in the first, second, third and fourth line respectively.
Leaving one line space, write down the name of your boss or supervisor followed by his designation, department and the company’s name in the same way as mentioned in the step above.
Again leave one line space to mention the subject which should be bold and underlined mentioning the task you require leave for.
Address your supervisor writing Sir or Madam, depending on the gender or simply write To Whom It May Concern.
Instead of writing a lengthy introduction, get to the point straight away and describe the reason for your leave.
Mentioning words like please or kindly ask for the leaves you need with duration and your return date.
Make sure that you mention those days and dates on which you will not be available. In case you need more immediately inform your supervisor.
Conclude the letter by a couple of sentences showing appreciation for your boss in a way that he or she feels motivated to approve your requested leave.