To use the format of a business letter is very important when you write to your business partner or to a business company. Such types of the letters differ from the letters, which we usually use to write to our family or friends. A business letter you should write in a more formal and civil way.

There are two chief formats, which are usually used in a business letter, and they are called as a full block format and a modified block format. A business letter in a full block format presupposes that each line in it should start at the left margin of the letter, for example:
Peter Marks
124 Karl Avenue
Albany, 136245

The 10-th of June, 2010
Mrs. Kate Winsdom
Mork Inc.
345 Liberty Avenue
New Haven, 554610

Dear Mrs. Winsdom,
I am writing to ask for the job of a chief accountant. Please, send me your answer on the address, which is written above.
Thank you for your time and attention.
Sincerely,
Peter Marks (by hand)
Signature
Peter Marks (in a printed way).

A letter in a modified block format presupposes that some lines may be moved over the right margin of the letter, for example:
Peter Marks
124 Karl Avenue
Albany, 136245

The 10-th of June, 2010
Mrs. Kate Winsdom
Mork Inc.
345 Liberty Avenue
New Haven, 554610

Dear Mrs. Winsdom,
I am writing to ask for the job of a chief accountant. Please, send me your answer on the address, which is written above.
Thank you for your time and attention.

Sincerely,
Peter Marks (by hand)
Signature
Peter Marks (in a printed way).