How to Write Undertaking Letter

Many don’t know how to write undertaking letters, because not everyone deals with correspondence but some of us will come across this in our line of business. If you come across it, you will realize that it can be a bit challenging to find your way around it but trust me, it isn’t rocket science. In this article, we will give you a comprehensive breakdown of how to write an undertaking letter. This will get you up to speed on the nitty-gritty of writing the letter.

What Is an Undertaking Letter?

An undertaking letter refers to a formal document that includes a statement of commitment to a cause or an agreement. Think of it as a signed record of commitment between two parties. After the spoken word of agreement, it is used as an assurance that the other party won’t default on what has been agreed. Therefore, when an agreement, pledge, or promise has been attained, the letter will outline what has been agreed upon, the exact date of the agreement, name, and signature of the parties involved. In case there is a breach of an agreement or default on terms the undertaking letter can be used as evidence in a court of law.

People that can write an Undertaking Letter

An undertaking letter can be used for many purposes that we will soon explain, this is why it is not just limited to an office. Here are the people that can write an undertaking letter:

  • Individuals (Students, businessmen/businesswomen, etc.),
  • Parents of students.
  • An Attorney for clients,
  • Traditional ruler,
  • Organizational or spiritual leaders, etc.

Reasons for Writing Undertaking Letter

The major reason for writing an undertaking letter is to have a written agreement with another party, this is why the reason for this letter varies. Your reason may be quite different from another’s wherein some may write by themselves, while others may write for others. Here she reasons for writing an undertaking letter:

How to Write Undertaking Letter

There is a specific format for writing an undertaking letter and this serves as a guideline to the right structure. Here is the general outline to write an undertaking letter:

The sender’s information

Just like most formal letters, start the letter by writing your name, address, and contact information.

The receiver’s information

Right below your information, write the receiver’s contact. This includes their name, position, organization, and address.


This is the formal greeting and it can be, “To Whom It May Concern” or “Dear Mr./Mrs… [the recipient’s name)


This is the opening paragraph that will state the reason why you are writing the letter and provide other background information necessary to the agreement.

State Your Commitment

The essence of the undertaking is to express that you are committed to the agreed-upon obligations. So, put it into writing clearly and concisely. With specific details that will state the deliverables, timelines, and other specific conditions.

Additional Details

This is necessary if there are other supporting documents in the process of the agreement. This could be contracts or legal requirements. In some cases, the additional details could be qualifications, evidence of financial stability, references, etc. Ensure you provide those and state that you have attached a copy as an enclosure, to further strengthen your commitment. This serves as evidence of the agreement.


Conclude the letter by stating that you are willing to address any concerns the other party may have. Also, summarize your commitment to fulfilling your obligations.

Complimentary Close, Signature, and Enclosures

Now it’s time to end the letter as you do for other formal letters. That is, “Yours Faithfully”, or “Sincerely.” This will be followed by your name and signature. If you have mentioned any additional documents in the body of your letter, list them as enclosures below your signature.


One cannot be too careful. Take a moment to proofread all that you have written, and check the spelling and grammatical errors. Ensure that all the provided information is correct and consistent. Make sure your letter aligns with your intentions.

Ensure you have either soft or hard copies of your undertaking letter after it has been signed and keep it safe.

General Tips for Writing an Undertaking Letter

Here are the tips to write an effective undertaking letter:

Understand the Terms

An undertaking letter is legally binding, so you do not want to get into trouble. Before writing, go over the terms, deliverables, and timelines, and understand your required obligations.

Be professional

This is a formal letter and should be treated as such. Do not be vague or use an informal tone. Be clear, concise, and professional all through.

Be Specific

When you are writing your obligations, specify the exact duty you have agreed upon. It should be spelled out for the other party.

Attach Supporting Information

If you have mentioned any relevant documents in the body of the letter, be sure to enclose them. This will further ascertain your credibility.

Structure The Letter

This is not an informal letter, so your letter should be formatted properly. We have listed the general outline for writing the undertaking letter, follow the steps.

Ensure the letter is concise

Do not include irrelevant information. Go straight to the point and make sure you don’t ramble unnecessarily.

Be Authorized

As a signatory ensure you have the authority to sign the letter. If you are signing on behalf of another individual, state your name, title, and position.

Seek Legal Advice

You may not understand the terms of some contracts, don’t just write and sign them, seek legal advice. A lawyer is trained for such and they will be able to put you through.

Here is a sample format for Undertaking Letter

[Your Name, Contact Information, and Date]

[Recipient’s Name, Designation, and Contact Information]


Dear [Recipient’s Name] / To Whom It May Concern


I, [Your Name], am writing this letter to provide a formal undertaking regarding [specify the purpose or context of the undertaking]. I hereby confirm my commitment to fulfill the following obligations and responsibilities as outlined below:

[Clearly state the required obligations or responsibilities]

[Provide specific details, such as timelines, deliverables, or conditions]

[Explain any relevant milestones or targets]

[Include any supporting documents or references, if applicable]

I pledge that I will be diligent in undertaking the aforementioned obligations to the best of my abilities. I will not default on meeting the agreed-upon terms under any circumstances.

To further support my commitment, I am enclosing [list any supporting documents/materials attached to the letter. You can skip if you do not have any].

If you have any questions, or concerns, or require further clarification concerning this undertaking, kindly reach out to me.

Thank you for trusting my ability to fulfill these obligations, and I look forward to working collaboratively to achieve the desired outcomes.


Yours Sincerely,

[Your Name]


Enclosure(s): [List any attached documents, if applicable]

Frequently Asked Questions

What is the purpose of letter of undertaking?

A letter of undertaking assures and enforces the agreement between two parties. It is a written document that is signed as a formal commitment and a breach in terms is punishable.

How do I write a letter of undertaking?

To Write an undertaking letter, outline your terms of commitment formally, and be clear and concise about it.

How do you end an undertaking letter?

When ending an undertaking letter, use a formal closing which is complimentary Close, your name, and signature.

Who can write an undertaking letter?

An undertaking letter can be written by an individual, company, legal entity, or authorized representative.

What are the advantages of letter of undertaking?

An undertaking letter provides clarity of purpose, establishes trust and confidence, it is legally binding, facilitates expectations, mitigates risks and uncertainties, etc.


Do not forget that an undertaking letter is legally binding. Before you sign it, understand all that is required of you and the implications if the contract is breached. Write it in the accepted format, professionally, and with care and accuracy. If you are confused about any aspect of the letter, kindly seek legal advice so you will not suffer its implications.

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