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Discover what a letter of authorisation is and learn how a template can help you streamline the process.
Navigating the different nuances of legal documents is usually daunting for those who are just beginning their career in the field. Among the various types of documents, a letter of authorisation is specifically important because it grants permission or power from one party to another. Read this article to learn more about what a letter of authorisation is, the tips and steps you can follow to write one and the answers to some frequently asked questions.

What is a letter of authorisation?

A letter of authorisation serves as a formal permission tool that delegates authority or power from one party to another. It allows the secondary party to perform crucial actions on the principal party’s behalf. The actions that an individual or an entity can carry out with a letter of authorisation can range from financial transactions to making medical decisions.

Some examples of situations when you can use a letter of authorisation include the following:

  • Financial transactions. If you’re travelling to a different country and would like to designate someone to manage your bank account from your home country, you can issue a letter of authorisation to an individual you trust, like your spouse. This letter of authorisation will enable that person to handle bank withdrawals, deposits and other permissions of your choice.
  • Medical decisions. If you were going to undergo medical surgery, you could write a letter of authorisation to authorise your spouse to make medical decisions on your behalf. These decisions can include surgical procedures or other treatments that your doctor may recommend.

A letter of authorisation is only one example of official documents in the legal field. Letters of intent and affidavits also serve unique purposes in formal proceedings:

  • A letter of intent is usually the first step in formalising the negotiation process before two parties enter into a binding agreement. It’s different from a letter of authorisation because it doesn’t grant permission to act on someone’s behalf, but it outlines an understanding between parties looking to engage in a contract.
  • An affidavit, on the other hand, is a binding document used in legal proceedings that serves to present evidence or verify information under oath.

Formal documents, including a letter of authorisation, require clear and specific information that must be understood by all parties involved. Starting with a template can help to ensure all the necessary details are in place.

Free letter of authorisation template.

Now that you understand what a letter of authorisation is, you may want to learn how to write a letter of authorisation if you need one. Use this free letter of authorisation template.

Screenshot of a letter of authorisation template.

You can use the following copy to guide you in creating your letter of authorisation:

[Your name]

[Your address]

[City, state, postcode]

[Email address or phone number]

[Date]

[Recipient’s name]

[Recipient’s address]

[City, state, postcode]

Dear [Recipient’s name],

I, [Your name], hereby authorise [Authorised person’s name] to act on my behalf from [Start date] to [End date] in regard to [situation]. This authorisation includes the following powers or tasks:

  • Task 1
  • Task 2
  • Any additional tasks

[Authorised person’s name] should have the authority to handle documents, make decisions and undertake any necessary action related to the matters specified above within the written period.

For any verification or questions, you can reach me at [Your email address].

I thank you for your cooperation and understanding.

[Your name and signature]

View an example of how you can put the letter of authorisation template to use.

Penny Lane

123 Yellow Brick Road

Washington, D.C. 20005

penny.lane@example.com

(123) 456-7890

28 March 2024

Oz Community Credit Union

Customer Service Department

666 Rock Bottom

Washington, D.C. 20001

Dear customer service representative,

I, Penny Lane, residing at 123 Yellow Brick Road, Washington, D.C. 20005, hereby authorise Sky Walker, my cousin, to act on my behalf in dealing with all the matters related to my checking and savings account (#123456789) at Oz Community Credit Union from 29 March 2024 to 29 March 2025.

During this period of time, I grant Sky Walker permission to:

  • Withdraw funds from my account to a limit of $6,000.
  • Make deposits into the account.
  • Request any account statements and transaction histories as she sees necessary.
  • Communicate with bank representatives regarding account queries and questions.

This letter of authorisation doesn’t allow Mrs Walker to open or close any accounts in my name, apply for loans or change the account’s beneficiary information.

Please acknowledge the receipt of this letter of authorisation by contacting me via email at penny.lane@example.com.

Thank you for your attention to this matter.
Regards,

A signature for the name "Penny Lane" is shown.
Penny Lane

5 steps to write a letter of authorisation.

No matter why you need to use a letter of authorisation — managing financial accounts, making medical decisions or handling properties — this document is the perfect tool you’ll want to use to make your processes easier. However, writing a clear and concise letter can be challenging if you’re unfamiliar with it and unsure about where to start. Here are five steps you can follow to craft one effectively.

1. Identify the parties involved.

Start by stating your name and address along with the name, address and other relevant information of the individual you’re authorising. This identification at the start of your letter sets a great foundation for the agreement as it clarifies who is involved and under what capacity.

2. Specify the authority granted.

Detail the specific actions the authorised person can perform. Try to be as clear and meticulous as possible to avoid confusion or ambiguity.

3. Define the duration of the agreement.

Include the start and end dates for the authorisation. This step is important to ensure that the authority isn’t open-ended. If the authorisation is for a single transaction, mention that explicitly.

4. Include any necessary details.

You might need to include additional information for the arrangement to be effective, but this step depends on the nature of the authorisation. For example, this could be account numbers, specific conditions under which they can act or limitations to the authority you grant the authorised individual.

5. Sign the document.

Lastly, both the person granting the authorisation and the authorised individual should sign the document. It’s also often important to have the signatures notarised to add an extra layer of validity, especially if you need to authorise more significant transactions.

You can use Adobe Acrobat for business for all of the steps of the letter of authorisation creation process, such as formatting, writing, editing and signing the PDF.

Frequently asked questions

How do I write a simple letter of authorisation?
A simple letter of authorisation should generally state your name, the name of the person you're authorising, what they're permitted to do, and how long it's valid for. It's worth including the date, your signature, and any supporting details needed to confirm the request. Requirements can vary depending on what the letter is for, so it's worth checking what applies to your situation or seeking independent legal advice for anything significant.
How do you write a letter to allow someone to act on your behalf?
To allow someone to act on your behalf, you can write a letter explaining who you're authorising, the specific actions they can take, and any limitations that apply. Being clear about the dates of the authorisation, and signing the letter, can help confirm its authenticity. Adobe's online PDF editor may help you format the letter before sending it, though some features can require sign-in or a paid plan. Requirements vary by situation, so it's worth checking what applies to you or seeking independent legal advice.
What is the format of an authorised person letter?
A letter of authorisation typically includes your contact details, the recipient's information, a clear statement of authorisation, the authorised individual's information, the purpose of authorisation, any time limits, and a signature. Keeping the format clear and professional can help avoid misunderstandings, though exact requirements may vary — check what's needed for your specific situation.
What’s the difference between a letter of authorisation and a power of attorney?

Both documents can grant someone the ability to act on behalf of another person, but they generally differ in scope, duration and legal authority.

A letter of authorisation is usually short-term, for a defined period, and specific in focus — it typically grants permission for a particular task and doesn't usually confer broad legal powers.

A power of attorney is generally more comprehensive. It can allow someone to make wider decisions on another person's behalf, such as financial or medical decisions, and can remain in effect even if the person granting it becomes incapacitated. Because the legal implications differ, it's worth seeking independent legal advice if you're unsure which is appropriate.

How do you write an authorisation letter to allow someone to collect documents?

To write a letter authorising someone to collect documents on your behalf, you'd typically include your name, the date, and your contact information, along with the recipient's details and a clear statement that you're authorising someone else to collect documents for you.

You'd usually also name the person you're authorising, specify the documents they can collect, mention any ID verification they may need to provide, and include the letter's validity period. Requirements can vary, so it's worth checking what's needed in your situation.

How do I write a notarised letter of authorisation?
Notarisation is generally only required in certain circumstances, such as international or legal transactions. If a notarised letter of authorisation is needed, you'd typically prepare the letter first, then sign it in front of a qualified notary public, who verifies your identity and witnesses your signature. It's worth checking the specific requirements that apply to you, or seeking independent legal advice.
How long is a letter of authorisation valid?
A letter of authorisation is usually valid for the period stated in the document. If no end date is included, its validity may depend on the purpose of the authorisation or the organisation receiving it. Including a clear end date — or stating that authority continues until revoked — can help avoid confusion. Requirements vary, so it's worth checking what applies to your situation.
Are there legal requirements for a letter of authorisation?
Requirements vary depending on how the letter will be used. In many cases, a signed letter with clear details of the authorisation is enough, though some organisations or legal processes may ask for additional identification, witnesses or notarisation, particularly for high-value or international transactions. It's worth checking the specific requirements that apply, or seeking independent legal advice.
Can a letter of authorisation be used internationally?
A letter of authorisation can potentially be used internationally, but requirements vary between countries and organisations. Some may ask for the letter to be notarised, translated, or accompanied by additional documents. It's worth checking the specific requirements before relying on the document abroad, or seeking independent legal advice.
How do I revoke a letter of authorisation?
To revoke a letter of authorisation, notify the authorised person and any organisations that received the original document as soon as possible. Providing written confirmation that the authorisation has been withdrawn can also help prevent any misunderstandings or unauthorised actions afterwards.
What are common mistakes to avoid when writing a letter of authorisation?
Common mistakes include giving vague instructions, missing important details, forgetting to include dates or signatures, and not clearly identifying the authorised person. Proofreading your letter before sending can help ensure the information is accurate and easy to understand, reducing the chance you'll need to redo it.
Are there industry-specific templates for letters of authorisation?
Letters of authorisation are often tailored for industries such as healthcare, finance, education and legal services. Using a template designed for your situation can help you include the relevant information while keeping a clear, professional format. Adobe Acrobat can also help you create, edit and share documents. Requirements can vary by industry and jurisdiction, so it's worth checking what applies to you.

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