how to write formal and informal letter in english??

 Business letters can be formatted in several different ways, but the most popular format is the block format. All business letter formats contain the following parts.

1. Return address of the person who writes the letter.

2. The date of the letter.

The date can be written in two different ways. You can begin with the day. In this case, no comma is used. Example: 28 March 2012. Or you can begin with the month. In this case, a comma is used. Example: March 28, 2012.

3. Complete name, title, and address of the recipient.

If you are writing to a man, use the title ‘Mr.’ If you are writing to a married woman use the title ‘Mrs.’ If you don’t know the marital status of a female recipient, it is best to use ‘Ms.’

4. Salutation with a colon.

The most common salutation used in a business letter is ‘Dear’. It should be followed by the title and surname of the person you are writing to. After ‘Dear X’ put a colon. Example: Dear Ms. Smith:

Do not use a title like Mr. together with a first name. (NOT Dear Mr. John Mathews)

Instead, write: Dear John Mathews OR Dear Mr. Mathews.

Leave an empty line after ‘Dear X’ and start again on the left.

5. Body of the letter.

Business people don’t have the time to read long letters, so keep your letter short and to the point. Don’t write more than three or four paragraphs on a page. Use double space in between paragraphs.

6. Closing.

The most common closing used in a business letter is "Sincerely." You can put a comma after ‘Sincerely’, but it isn’t exactly necessary. Press the ‘Enter key’ twice after the closing and type your name. Sign your name in the space above your name.

Sincerely,

(Handwritten signature)

Jonathan Wilson

7. Enclosure.

Are you enclosing additional documents (e.g. resume or CV) with your letter? In that case, skip two single lines (press the ‘Enter’ key once) after your typed name and type "Enclosure" or "Enclosures." Use the plural form only if you have more than one document to enclose.

Sample business letter (block format)

1800 MG Street
Andheri, Mumbai

March 28, 2012

Mr. James Albert, Secretary
Department of Physics
Mumbai University
Mumbai 123456

Dear Mr. Albert:

I am writing to inquire about the post graduate degree course in physics offered by the University of Mumbai. I am a graduate in physics. I should be grateful if you would send me information about the regulations for admission to the course. Could you also tell me whether the University arranges accommodation for students?

Sincerely

John Mathews

 hope that this could you

Informal Letter Format

help you

English Formal Letter Writing Format

Sender's Address

Sender's Contact

Date

Recipient Name and position
Recipient Address

Salutation

Subject Head

Body

Yours Sincerely

Sign

Name

Note:

1) If you are writing to somebody as representative of an organisation, you are to include the name of YOUR organisation before the sender’s address and also YOUR position/ status in the company at the END after your name.

2) Use ‘Yours sincerely’ if you know the recipient’s name eg Dear Mr Tan

3) Use ‘Yours faithfully’ if you don’t know the recipient’s name

English informal Letter Writing Format

Sender's Address

Date

Salutation

Body

Yours Sincerely

Sign

Name

Note:
For informal letter, you may use sign-off with other appropriate phrases such as ‘Your friend’ depending on the context of the letter.

my opinion go check in google