Composition - Letter Writing - Formal and Informal Letters

 


Letter writing is a form of written communication where thoughts, information, or requests are conveyed in a structured format. It can be formal or informal, depending on the purpose, audience, and tone.


✉️ Formal Letters

Formal letters are written for official or professional purposes. They follow a strict format, use polite and precise language, and avoid casual expressions.

Characteristics:

  • Professional tone
  • Clear structure (sender’s address, date, recipient’s address, subject, salutation, body, closing, signature)
  • Objective and factual

Examples of Formal Letters:

  • Business letter (to clients, companies)
  • Official letter (to government departments, institutions)
  • Application letter (for jobs, admissions, leave)
  • Complaint letter (about services or products)
  • Invitation letter (for meetings, events)
  • Resignation letter

💌 Informal Letters

Informal letters are written for personal communication. They are friendly, expressive, and flexible in format.

Characteristics:

  • Conversational tone
  • Free structure (no strict rules)
  • Personal feelings, emotions, and casual language

Examples of Informal Letters:

  • Letter to friends
  • Letter to family
  • Letter of congratulations
  • Letter of condolence
  • Letter of thanks
  • Letter sharing news

✨ Key Difference

  • Formal letters → Professional, structured, objective.
  • Informal letters → Personal, casual, emotional.

Here’s a diagrammatic infographic comparing formal and informal letters side by side:


📊 Formal vs. Informal Letters

AspectFormal LetterInformal Letter
PurposeProfessional or official communicationPersonal or casual communication
TonePolite, respectful, objectiveFriendly, emotional, conversational
StructureStrict format: sender’s address, date, recipient’s address, subject, salutation, body, closing, signatureFlexible format: greeting, body, closing (no strict rules)
LanguageFormal vocabulary, no contractions or slangInformal vocabulary, may include contractions, idioms, or slang
ExamplesBusiness letters, job applications, complaint letters, official noticesLetters to friends, family, congratulations, condolences, sharing news
LengthConcise and to the pointCan be longer, with personal details

✨ Quick Visual Contrast

  • Formal letter“Dear Sir/Madam, I am writing to apply for the position…”
  • Informal letter“Hi Alex, Guess what happened yesterday!…”

This side-by-side comparison makes it clear: formal letters are structured and professional, while informal letters are personal and flexible.


In both companies and the government, letter writing plays a vital role in official communication. Each institution drafts specific types of letters depending on its needs, audience, and purpose.


🏢 Drafted Letters in Companies

In business organizations, formal letters are essential for professional communication. They follow a structured format, maintain a polite and precise tone, and are used for official purposes such as transactions, employee management, and external correspondence.

  • 🏢 Common Types of Formal Letters in Business Organizations

    • Business correspondence letters — General communication with clients, partners, or stakeholders.
    • Sales letters — Promoting products or services to customers.
    • Order letters — Placing or confirming orders for goods or services.
    • Complaint letters — Addressing issues with suppliers, services, or products.
    • Adjustment letters — Responding to complaints or resolving disputes.
    • Acknowledgement letters — Confirming receipt of goods, payments, or documents.
    • Appointment letters — Offering jobs or confirming employment.
    • Resignation acceptance letters — Officially acknowledging an employee’s resignation.
    • Recommendation letters — Endorsing employees or associates for opportunities.
    • Circulars — Internal communication about policies, updates, or announcements.
    • Meeting notices — Informing employees or stakeholders about scheduled meetings.
    • Invitation letters — Inviting clients, partners, or employees to events.

    ✨ Key Features of Business Formal Letters

    • Structured format (addresses, subject line, salutation, body, closing, signature).
    • Objective and professional tone.
    • Used for clarity, accountability, and efficiency in organizational communication.

🏛️ Drafted Letters in Government

  • Appointment letters — Assigning officials or employees to specific posts.
  • Transfer letters — Moving staff between departments or locations.

  • Promotion letters — Informing employees of advancement in position.

  • Warning letters — Issued for misconduct, negligence, or violation of rules.

  • Show cause notices — Asking individuals to explain or justify their actions.

  • Circulars — Communicating policies, instructions, or updates to multiple offices.

  • Sanction letters — Approving funds, projects, or permissions.

  • Official notices — Announcing rules, regulations, or administrative decisions.

  • Recommendation letters — Endorsing individuals for positions, benefits, or opportunities.

  • Invitation letters — For official functions, meetings, or ceremonies.

  • Complaint letters — Addressing grievances or reporting issues formally.

  • Acknowledgement letters — Confirming receipt of documents, funds, or communication.

✨ Key Features

  • Highly structured format (addresses, subject line, salutation, body, closing, signature).

  • Objective, precise, and respectful tone.

  • Used for administrative efficiency, accountability, and transparency.


✨ Key Difference

  • Company letters → Focus on business operations, client relations, and employee management.
  • Government letters → Focus on administration, policy communication, and official authority.

Click on the link to explore a variety of letter formats and templates

https://word.cloud.microsoft/create/en/letters-templates/


A formal letter is used for professional or official purposes, such as job applications, business inquiries, or complaints to authorities. An informal letter is written to family, friends, or close acquaintances in a casual, personal tone. [1, 2, 3, 4, 5]

1. Formal Letter Sample (Sick Leave Request)

This format, as seen on Vedantu, uses professional language and a structured layout. [1, 4]
[Your Name]
[Your Address]
[City, State, Zip Code]
Date: 15 April 2026
[Recipient's Name or Title]
[Organization Name]
[Organization Address]
Subject: Request for sick leave
Dear [Recipient's Name/Sir/Madam],
I am writing to formally request sick leave for two days, from 16 to 17 April 2026, as I am suffering from a severe viral fever. My doctor has advised complete bed rest for a speedy recovery.
I have ensured that all my pending tasks for these days are either completed or handed over to [Colleague's Name] to avoid any disruption. I will be reachable via email for any urgent matters. 
Thank you for your understanding.
Yours sincerely,
(Signature)
[Your Printed Name] 

2. Informal Letter Sample (Birthday Invitation)

Informal letters, such as those found on BYJU'S, use a warm tone and personal greetings.
[Your Address]
[City, State]
Date: 15 April 2026
Dear [Friend's Name], 
How have you been? I hope you and your family are doing great. It feels like forever since we last hung out! 
I’m writing because my birthday is coming up on 1st May, and I’m hosting a small party at my place starting at 6 PM. There will be plenty of music, games, and, of course, a huge chocolate cake! It wouldn't be the same without you there. 
Please let me know if you can make it by next weekend. I can't wait to catch up and have some fun together!
Lots of love,
[Your Name]

Key Differences at a Glance

Feature Formal LetterInformal Letter
PurposeOfficial/ProfessionalPersonal/Social
ToneObjective and PoliteCasual and Friendly
ContractionsAvoided (e.g., "I am")Common (e.g., "I'm")
Sign-offYours sincerely/faithfullyBest wishes/Love

Letter writing has two main categories — formal and informal — and each has distinct components that shape its structure and tone.


🏛️ Components of a Formal Letter

Formal letters are used for official or professional communication. They follow a strict format and maintain a respectful tone.

  • Sender’s address — Placed at the top left.
  • Date — Written below the sender’s address.
  • Recipient’s address — Includes name, designation, and organization.
  • Subject line — States the purpose of the letter clearly.
  • Salutation — Polite greeting (e.g., Dear Sir/Madam).
  • Body — Divided into introduction, main content, and conclusion.
  • Closing — Formal ending (e.g., Yours faithfully, Yours sincerely).
  • Signature — Name and designation of the sender.

💌 Components of an Informal Letter

Informal letters are used for personal communication with friends, family, or acquaintances. They are flexible and conversational.

  • Sender’s address — Usually at the top.
  • Date — Below the address.
  • Salutation — Friendly greeting (e.g., Dear John, My dearest friend).
  • Body — Free-flowing, emotional, and personal.
  • Closing — Casual ending (e.g., Yours lovingly, Best wishes).
  • Signature — Just the sender’s name or nickname.

✨ Key Difference

  • Formal letters → Structured, professional, objective.
  • Informal letters → Flexible, personal, emotional.

Comments

Popular posts from this blog

Sample Match the following - Fruits and Vegetables