Study Guides/English/Formal and Informal Letter Format
Study Guide · English

How to Write a Letter: Formal vs. Informal Format

Letter writing is a critical skill in the English language and a mandatory question in almost every school board exam. Letters are strictly divided into two categories based on who you are writing to: Formal Letters (for official purposes) and Informal Letters (for personal relationships). Using the wrong format can result in a massive loss of marks.

Question (Click to Flip)

Can I say 'Yours faithfully' in an informal letter?

Answer

No. 'Yours faithfully' or 'Yours sincerely' is strictly reserved for official business. For family and friends, you must use 'Yours lovingly' or 'Warm regards'.

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Key Facts

In modern letter writing (Block Format), every single line—including the date, address, and closing—must start aligned to the extreme LEFT margin. Do not put the date on the right side.

In a formal letter, never use contractions like 'Don't', 'Can't', or 'Won't'. Always write the full words: 'Do not', 'Cannot'.

1. What is the Difference?

  • Formal Letter: Written to a Principal, a business manager, a newspaper editor, or a government official. The language must be strict, highly respectful, and directly to the point. No slang or emotional language is allowed.
  • Informal Letter: Written to a friend, mother, brother, or cousin. The language is casual, friendly, emotional, and conversational.

2. The Formal Letter Format

A formal letter is strictly structured into 7 specific parts on the left side of the page:

  1. Sender's Address: (Your address, 2-3 lines)
  2. Date: (e.g., 15th October 2023)
  3. Receiver's Address: (e.g., To, The Editor, The Times of India, New Delhi)
  4. Subject: (A very short, 1-line summary of why you are writing. e.g., Subject: Complaint regarding bad roads)
  5. Salutation: (Respected Sir/Madam, or Dear Sir)
  6. Body of the Letter: (Divided into 3 paragraphs: Introduction, Main Problem, and Suggested Solution/Request).
  7. Closing: (Yours faithfully, or Yours sincerely, followed by your full signature and name).

3. The Informal Letter Format

An informal letter is much simpler and more relaxed. It does NOT need a subject line or the receiver's address.

  1. Sender's Address: (Your address)
  2. Date: (e.g., 15th October 2023)
  3. Salutation: (e.g., Dear Mom, or Dearest Rahul,)
  4. Body of the Letter: (Ask about their health, chat about your life, and convey your message casually).
  5. Closing: (Yours lovingly, or With lots of love, followed by your first name).

Questions and Answers

Can I say 'Yours faithfully' in an informal letter?+

No. 'Yours faithfully' or 'Yours sincerely' is strictly reserved for official business. For family and friends, you must use 'Yours lovingly' or 'Warm regards'.

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