Sick leave application for office

Use this to tell your manager that you are unwell and need leave, or to apply for the sick leave you already took.

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To The Manager, [Company or Office Name], [City] Date: [Date] Subject: Sick leave from [From Date] to [To Date] Dear Sir/Madam, I am not well. I have [Illness, for example a viral fever], and my doctor has advised rest for [Number of Days] days. So I request sick leave from [From Date] to [To Date]. [Name of Colleague] has kindly agreed to look after my urgent work during this time. I can be reached on my phone for anything that cannot wait. I will attach the medical certificate when I rejoin, if it is required. Thank you for your support. Yours sincerely, [Your Name] [Your Designation] Employee ID: [Employee ID]

When to use this letter

Use this when illness keeps you from work, whether you are informing the office on the first day or putting leave already taken on record. A quick message to your manager is right for the first morning; the application is what HR and payroll need so that the days are counted as sick leave and not as absence.

Before you send it

Tell your manager by phone or message as early as you can on the first day. The written application follows.
Say who will cover your urgent work. It is the first thing a manager wants to know.
Check your company's leave policy for when a medical certificate is needed. Many ask for one when sick leave is longer than two or three days.
You do not have to give medical details. The name of the illness, or just "unwell", is enough.

What to attach

Medical certificate, if your company's policy asks for it

How to send or submit it

Email it to your manager, with HR in copy if that is the practice in your company, and apply on the HR portal as well if there is one. When you return, hand in or upload the medical certificate if the leave policy asks for it.

Mistakes that get it sent back

No dates, or dates that do not match the medical certificate.
Sent days after returning to work, with no message at the time of falling ill.
Sent only to a colleague or on a team chat, and never to the manager or HR.
A certificate was required by the policy and none was attached.

Common questions

Can I send a sick leave application by email?

Yes. Use the subject line as the email subject and the rest as the body. Most offices now prefer email or the HR portal over paper.

This is a general format, written by us, to save you time. If the company has its own printed form, use that form. Last checked: 11 November 2026.

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